Hulu is a new (ish) service intended to bring the best content for you, to you, on the web. I've always been slightly surprised no one's come anywhere close to doing this right yet (there are a few competitors, most of which seem to be very shiny but I haven't actually seen achieve very much), but honestly the most surprising thing on the Hulu site is where they categorise Buffy the Vampire Slayer as a "TV classic".