Remembering how scared the RIAA was of music on the internet, I find it hilarious that the studios put all their best songs on Youtube so you don't have to buy their albums to have a listen.
[EDIT] and in related three-year-old not-news-to-anyone-but-me, Funimation put all six eps of FLCL on Youtube. Nice.
[Edit #2] Funimation has a whole bunch of series on Youtube. Niiiiice.