TheStage -- It's Yours! - Live Worldwide Open Mic 
(thestage.tv)
(Very, cool site for music lovers - especially songwriters! Integrated with YouTube, but the performances are streaming live. A copy of the artist's thestage.tv performance is put into their YouTube account for future viewings)
They bill it as:
The world's Open Mic!
A quote from their website:
"In a world filled with talented performers, TheStage.tv was developed to help the best rise to the top, and for everyone else to have fun, including the audience!
TheStage.tv is a one-of-a-kind live video open mic format where audience feedback determines how long a performer takes control of TheStage. Click here to find out How It Works.
TheStage.tv was developed by entrepreneurs who love the arts and entertainment and want to give web audiences the power to share real-time feedback with performers. As well, we did our best to replicate the experience of a contemporary venue where performers can here the audience cheer, as if they were really performing. And just like in Vaudeville, the audience can still them a gold coin!
The patent-pending queuing process of TheStage.tv allows an audience to interact with performers like never before!
Creators and staff of TheStage.tv are wonderfully appreciative of EVERYONE who has performed (and will perform) on TheStage.tv, and hope we contribute positively to your performance enjoyment. For audiences, we hope you enjoy our merging of entertainment and the "real-time web" to create a fun and addicting form of entertainment."
I like this site a lot, but then again I'm a music nut.
