They've actually been around for several months, although they are still in beta testing. If anyone is interested, they have a Mac beta client (http://www.joost.com/blog/
). However, in order to get the Mac client, you have to be accepted as a beta tester. One Windows user I know signed up over a month ago and still hasn't heard back. I signed up a few days ago and got a confirmation (of my application) that said "This may take some time."
As I understand it, this will be advertiser supported. So, isn't this just like watching television except you can do it on a computer instead of a TV set?