Pandora has had a busy quarter. In March, the social radio company saw its long-time CEO Joe Kennedy abruptly step dow , leaving the board to scramble to find a replacement. On the bright side, Kennedy’s exit, while likely a result of stress, followed relatively good times for Pandora. And it’s continued to push forward since.

Pandora launched an ad-free version for Windows 8 in March, surpassed 200 million users (with over 140 million accessing Pandora via mobile) in April, then launched a “Premieres” station for U.S. users and deepened its Facebook integration with a new Timeline App.

Today, Pandora’s first quarter earnings reflected this flurry of activity, as the company saw GAAP total revenue increase 97 percent year-over-year to $83.9 million (with non-GAAP mobile revenue of $86.7 million), which outpaced mobile listener hour growth at 47 percent year over year. Meanwhile, total revenue came in at $125.5 million, representing 55 percent year-over-year growth and non-GAAP total revenue of $128.5 million.

Remember how over a year ago, everyone was all excited about the forthcoming Pinterest API? CEO Ben Silbermann even teased its release in a March 2012 email to Pinterest users detailing a Terms of Service change. And API documentation even once popped up on the site, only later to lead to a 404? Well, don’t get all excited again, but the API documentation has returned…um, sorta.*

This week, when Pinterest announced support for more pin types (product, recipe, and movie pins) as well as a new Pin It button that works in mobile apps, it also launched a developer site at developers.pinterest.com. The company says the site will be the home to some of the existing documentation and resources that had previously lived on the Pinterest Business site, as well as the new information on the pins and the mobile Pin It button.

“Over time, as more tools become available to third parties, we will continue to post resources on this site,” a Pinterest spokesperson says.

Paper by FiftyThree is one of the most beautiful digital products on the market today.

The immersive drawing app for tablets has won Apple’s Design Award, a Crunchie, and was most recently honored at Time Inc.’s 10 NYC Startups To Watch party. So how do you build on that kind of success?

Well, according to the founders, Paper is but the first product in a series of creative tools. The team is thinking pretty seriously about what comes next, and it seems as though a stylus is where things are headed.

Jawfish Games, a Seattle-based startup run by a former professional poker player and the engineering team that built the Fult Tilt Poker site, launched a gaming platform that can host more than 100,000 simultaneous players in real-time tournaments across iOS, Android and the web.

While asynchronous, turn-based games have done well on mobile platforms and Facebook over the last five years, pure, real-time multiplayer games haven’t caught on as quickly partially because data connections haven’t been fast enough and because a game developer would need a critical mass of players to match them synchronously.

But Jawfish, which has raised $3.65 million in funding from firms like Founders Fund’s angel fund, Right Side Capital and other angels, says it has built a platform to do just that. Their platform can support more than 100,000 simultaneous players and host 1 million tournaments for less than $10 in bandwidth.

Fresh from closing its purchase of newsreading app Pulse, LinkedIn has made another acquisition to dive deeper into the mobile space. TechCrunch has found out, and confirmed, that the social network has aqui-hired Maybe, the social polling startup founded by Omar Hamoui — the man who set up, ran and then sold mobile ad company AdMob to Google for $750 million.

All staff from Maybe, except for Hamoui himself, are now at LinkedIn and working in its mobile division. That includes four engineers and one designer, LinkedIn has told us. Meanwhile, Maybe itself has now shut down. Financial terms of the deal are not being disclosed.

Maybe first emerged in June of last year, a startup that was incubated and spun out of Hamoui’s now-defunct startup generator Churn Labs.

We’ve confirmed with Twitter that it has rolled out a new part of its #Music service for the web, charts that we were accustomed to from the company We Are Hunted, that it acquired and now powers the service.

The charts are broken up into a few areas: the familiar genre breakdown, as well as some categories like “Superstars” and “Unearthed” that appear to be built based on current Twitter trends and trajectory of artist mentions. This is leveraging all of the data that Twitter is collecting from tweets that include links to tracks from popular and emerging artists.

As you click on each category, the tiles on the page swap out quickly, letting you surf around to find new artists and songs. The categorization was a necessity to be able to find hidden gems, as the original breakdown of Popular and Emerging changed so rapidly:

Gifs, man! They’re trending harder than Jennifer Lawrence right now, but that doesn’t mean that finding them is the easiest thing in the world. That’s why Giphy, a startup that launched out of betaworks last month, is rolling out new tools to build out its library of awesome, high-quality gifs.

See, Giphy is a gif search engine. It lets you search by keyword for any gif you could possibly want, and then saves load time and keeps things snappy by only playing the gif once you hover over one of the results. But sourcing the gifs you want is just the first step in organizing the community, which is the true goal behind Giphy.

That said, the startup is today rolling out private artist accounts, which will bake attribution right into the gifs they create. The team has been looking for some of the most prominent gif creators and artists out there, and has chosen twelve to give private artists accounts.

Urturn, the social expressions platform that soft-launched as stealthily as possible last year by intentionally hiding under a really boring name, is getting ready to turn the volume up to 11 to start seriously recruiting teens and trend-setters to its meme-stuffed, fashion-friendly, music-loving platform. Today it has announced a $13.4 million Series A funding round, led by Balderton Capital with a $10.7 million investment. The private equity arm of Debiopharm Group invested the remaining $2.7 million. As part of the investment, Balderton founding partner Barry Maloney will join the Urturn board.

The London-based startup, which also has an office in the Valley, is also launching an iOS app today, funded by its Series A, to extend its web-based platform to mobile. An Android app is also in the works, due later this year. Prior to the Series A, Urturn had raised around $500,000 in friends/family funding.

So what exactly is a social expression platform? Urturn — pronounced ‘your turn’ — is best described as a viral meme-generator. It offers both a social toolbox for creating and sharing ‘expressions’ with other users, with support for sharing these out to other social networks such as Facebook, Twitter and Pinterest, and also a space to hang your creations and browse others (and/or follow celebrity users or your friends). It also has its own bookmarklet browser button to make grabbing source material for meme-making purposes even easier, as Pinterest does.