Joost, the P2P-powered TV killer we reviewed back in the heady days of the writers' strike that we found a bit wanting (and is on the skids), will work in your browser later this summer with a plug-in, rather than needing to install a whole separate app. As Valleywag points out, this might be a bit futile, since the next version of Adobe's Flash will have built-in file-sharing. Anyone out there still using Joost? [Valleywag]
The Joost interface is not well laid out and the content is mostly bad. The only thing that would make me use it would be integration with media center. Hulu is better but it should have media center integration too. Guess I use too much Media Center.