College Confidential is a good site and it will be even better with you on board. (I can't help but wonder what factors might have led you to this decision, but of course it's up to you how much or how little you want to share.)
Update: Here's an excerpt of the 12/17 blog post Jon published called "Why I left Stack Overflow":
In September and October, a series of events demonstrated that leadership within the company neither understood community management nor was willing to learn. In retrospect, that’s likely been the case for years, but the community team has traditionally been given discretion when it comes to community relations. The double-edged sword of attention meant more resources have been going to community-related projects, but also leadership has asserted more control. Unfortunately, their decisions repeatedly violated my standards for healthy community management. By November I was actively looking for a new job.
Thank you, Jon, for sharing your story with us.