Dave Caolo from TUAW sums up the rotten fruit of NBC's ditching iTunes for a home-brewed webcasting solution. The end result is an effective kick in the balls for everyone.
[From NBC officially removed from the iTunes Store - The Unofficial Apple Weblog (TUAW)]It requires Internet Explorer, the NBC Direct Player (Windows only) and the latest .Net framework. Videos are available for only 7 days after they initially air, and disappear from your computer 48 hours after you begin watching them (unless you remember to renew your license before then). Also, videos will only play on the computer used for the initial download.
Mac users cannot use the service, though NBC says a Mac version is "...planned for 2008." Finally, downloads cannot be transferred to portable devices.
Awesome.