How do you spur adoption of an iPhone app? Make it a must-have by Tuesday. Even if it hasn’t yet been released.

Hard to concoct a better marketing strategy than live video streaming site Ustream has to spur buzz around a new product launch. You certainly can’t fault the timing. Install their iPhone app now (if you can get it, which you probably can’t), and you can watch Tuesday’s inauguration of Barack Obama as president of the United States anywhere, so long as there’s a mobile signal. No computer or TV set required.

A short report
in Techcrunch today about the app is already burning up the blogosphere
and Twitter, spreading early-adopter techno-lust in its wake. Anyone can watch Obama on TV. But the inauguration on an iPhone? That outcools cool.