Watched the Heroes finale online this evening. It was my first attempt to watch a TV show online since the teeth-gritting exercise of watching the end of Pirate Master on CBS' very, very sucky Innertube two years ago.
Hulu is surely a lot better than Innertube, but it still froze up about a dozen times over the course of the show, most of the times for a second or two, but sometimes for 15 or 20 seconds. And this was at 9pm PT, so I really wouldn't want to try and use it in the middle of the day.
Much more notable, I thought, were their ads. They had 5 short ad spots. Two couldn't ever find anything to load, two were charity ads, and one was an ad for an actual company (though I'm not convinced it was paid for, since it was a public outreach thing). It suggests that these networks aren't convincing their sponsors to help them monetize their streaming*.
Which means we're still a ways off from the grand unification.
* I actually find this kind of ironic, because an online streaming site is much better able to control whether people have to watch their commercials than a (non-unified) TV ever could be.