Yammer CEO says he won’t hire anyone from Yahoo who doesn’t quit in next 60 days

David Sacks, the CEO of Yammer, is pissed. Last month he was hit with his first lawsuit from a patent troll. So when he saw that Yahoo was going after Facebook for patent infringement, he drew a line in the sand (well, on Twitter to be precise): “I’m declaring it: Yammer will never hire another former Yahoo employee who doesn’t leave in the next 60 days. Who will join me? #stopyahoo“

If Facebook pays up, experts say Yahoo may go full time patent troll

Yahoo has put the IP squeeze on Facebook, slapping it with a patent lawsuit during the quiet period in the run up to the social network’s IPO. While it’s tempting to see this as the first shot fired in a broader patent war centered around social networking, Lance Lieberman, a veteran New York patent lawyer with a specialty in software, thinks it’s just Yahoo’s first step down the dark path towards life as a patent troll.

Zynga’s Dyer invites developers to be publishing partners

Rob Dyer is having his coming out party today. He joined social gaming giant Zynga in October as head of partner publishing, and now he finally gets to tell the world what he’s been doing. Dyer is the man who must convince external game developers to publish their games on Zynga’s newly announced platform for social gaming. Games published on the platform will run on both Zynga.com and Facebook, enabling smaller game developers to reach Zynga’s audience of 246 million monthly active users.