Biz Stone, the co-founder of Twitter who recently stepped away from the company to relaunch Obvious, has taken a role as strategic advisor at Spark Capital. According to Mashable, startups Spark Capital has invested in include Twitter, Tumblr, Foursquare, Boxee, Kik and Stack Exchange. Stone also runs the Biz & Livia Stone Foundation and is a strategic advisor at AOL.

Biz Stone, Evan Williams and Jason Goldman, men responsible for Twitter, plan to re-start their former company The Obvious Corporation. Obvious was a company they formed prior to Twitter’s fame, and abandoned in favor of focusing on Twitter. The reborn Obvious will, in Stone’s words, “help people work together to improve the world.” What that means, exactly, is unclear, but it sounds like it will be a source of innovative products. All three have stepped back or resigned from Twitter to return focus to The Obvious Corporation. [TechCrunch]