To start off with.

Buffy the Vampire Slayer http://xeon.mine.nu:2070/migitis/episodes.htm

Enterprise http://trekker.ru/enterprise/episodes.shtml

Ali G Episodes http://www.lando.co.uk/

A list of loads of Shows, (Angel, Friends, Spiderman) http://www.topsites.uklinux.net/pages/


The best source is as always alt.binaries.multimedia where you can usually find US showings posted 24-48 hours after airing.

Will add more when I come across them.