I was just granted beta access to yet another online video site, called Hulu. It's got Fox and NBC programs, and that's about it for now, but I wanted to test out its embedding feature, which allows you to create your own clips from episodes to embed. Here's one of my favorite moments from "30 Rock" this season.
It looks like the whole episode is actually up there, it just jumps to the part I specified when you play it. But I think you can then jump around the whole episode or watch the whole thing by going back on the time bar. Which, is cool. I guess.