BlogTV is an Israel-based company that enables people to create their own live broadcast channel on the Web. Similar to UStream.tv, BlogTV empowers anyone with a webcam to create a destination channel for broadcasting live episodes.
I got a chance to sit down with BlogTV Vice President of Product & Content, Nir Ofir, at Supernova 2007 and got a live demo. While demonstrating the features of BlogTV, Nir showed its unique ability to connect two broadcasts together as co-hosts. The screen-shot (shown below) displays the live broadcast in which Nir connected us (Frank Gruber and Jen Consalvo) with Jeff Pulver on PulverTV. I do not believe UStream.tv or other services offer this type of service but would love to hear if there are other services out there that do something similar.
A BlogTV channel includes live chat collaborations tools and user contributed ratings. Users can record broadcasts or stream them live with the option to embed the show into other sites and blogs. In the short demo we saw, BlogTV appeared to work well, however we did notice a bit of a delay between the two co-hosts on the show. I am not sure if that was due to the poor Internet connection at Supernova or if it was the actual application itself - it could have been attributed to a number of things.
Bottom-line: BlogTV is a platform that enables users to create live broadcast channels via a webcam with ease.