I got the link to this website from "hisako" on Twitter.
Link 1: http://anime-manga.jp/index.html
Link 2: http://search.japantimes.co.jp/cgi-bin/nn20100218f2.html
This is a website that helps English speakers learn some common expressions in Japanese that you would hear from different characters in anime and manga. What I think is really neat about this website is that it demonstrates some of the different levels of Japanese speak according to different types. For instance the butler using honorifics from the humble perspective. The lessons are given with kanji, kana, or romanji (roman letters) and in spoken Japanese.
The website is still under construction, but check out what they've got so far. I'm pretty excited about this and I hope they expand it such that who ever wants to can easy learn basic Japanese in a fun way :).