TwitVid.com , lets iPhone 3GS owners post videos they've taken directly from the device.
Users can record a new video, or choose from an existing one in their libraries. It also features a handy upload bar to let you know how far the video has to go before it's done. The big twist is that TwitVid's got some technology running on its end that lets your followers start watching the clip before it's even done uploading.
Has anyone tried it yet?