Live video broadcasting. Ustream has a twitter powered chat, and also you can tweet when you go live.
The UStream Live Broadcaster iPhone app makes capturing live video and audio a cinch. Plus it offers you the the ability to poll viewers and promote on Twitter. It's especially useful when youG«÷re at an event and you want to capture something and get it out immediately. As a social media marketer and frequent conference attendee, I find it very useful.
You can go live on Ustream, or simply record on your Local network. Everything is saved on a secure server for you, for future use. Update your twitter status automatically when you go live, or upload a recorded video! Great fun! Show your wife where you are doing business, show your kids which new celebrity you met! Oh the benefits of a walking 'webcam'!