Garry Tan, one of the cofounders of easy-to-use blogging service Posterous, is moving on from the company. Tan will be leaving to take a position at Y Combinator, where he will serve as a designer in residence. Posterous doesn’t put much weight on titles, but Tan had a hand in the site’s engineering, design, and product development.

Posterous isn’t taking off as

Former TechCrunch developer Ben Schaechter left TC a couple months ago to launch his own startup and today we finally get to see the fruits of his labor. Sick of the poor analytics, lack of geographical information and little vote analysis on industry leaders like Poll Daddy, Schaechter built GoPollGo to maximize what he felt was the potential of polling services.

Says