Largehearted Boy has a huge list; DJ Martian is keeping track of lots as well.
I've been collecting and formatting a selection of the most important or interesting lists, with links to appropriate sources. The artist and album are marked as classnames, so it should be easy to use Greasemonkey to rewrite the links to point elsewhere, or to perform other tasks (I use a script that checks my local Amarok library and highlights those that I haven't yet heard, for example).