TechCrunch50 2009 in pictures

This week tech blog TechCrunch hosted the third iteration of its annual start-up show in San Francisco, the TechCrunch50, where50 new sites and services were launched.

The show wasstarted in early-2007 by TechCrunch founder Michael Arrington andentrepreneur and Weblogs co-founder Jason Calacanis as analternative to the DEMO conference series.Instead of paying to be on stage (once selected) as is done at DEMO,companies selected by Arrington and Calacanis get to present for free.

Here are some highlights of the show, in pictures.