Unfortunately I could not attend this years TechCrunch50 but I watched a good amount of the conference on Ustream.tv. I have posted the video demos of the three companies that impressed me the most on day one.
Angstro delivers critical business news about people and companies across professional networks. By leveraging existing services such as LinkedIn, Facebook, and Twitter, Angstro helps users to easily discover and share news about colleagues and clients. Unlike clipping services that confuse different people with the same name, Angstro both disambiguates names and analyzes social graphs to prioritize those relationships that matter most. Founded in 2007 by serial entrepreneurs with decades of experience developing real-time notification solutions, Angstro is located in Palo Alto, California.