UStream’s iPhone Video Broadcasting App is Live For Jailbroken iPhones, Still Not For App Store

UStream’s iPhone Video Broadcasting App is Live For Jailbroken iPhones, Still Not For App Store

Another really cool feature is the live poll, which you can activate and have all your viewers vote on. It sends an email to your account address when you close the poll.

The tech is there, so all that's left is for Apple to approve it. You can get it now by jailbreaking.