ReadWriteWeb recently posted about PrimeTimeRewind, a service that brings all the network tv full episodes together in one place with a rotating cube interface. PrimeTimeRewind just connects to the various network video sites, so, for example, when I clicked on Lost it took me to ABC to watch the latest episode online.
Through the same post and some of the comments I learned about another online video site – OpenHulu , which I believe has Fox, NBC and a few other affiliated networks. I like the interface at OpenHulu and I was able to start watching a video quickly without having to download a special player. OpenHulu is apparently based on another site — Hulu.com — that has been in private beta, but the site says that it will be open to the general public on March 12.