Launched by lawyer and tech investor Michael Arrington in 2005, TechCrunch became one of the world's most popular blogs by reporting on the movers and shakers of Silicon Valley. But take a look at the Valley these days: Nothing's moving. Nothing's shaking. Born of a boom that's long since gone bust, TechCrunch now seems irrelevant. Recent headlines such as "Box.net Hones In On Businesses With New Social Features" aren't helping. Stick a fork in this one — it's done.