Fun music-related site of the day - One of the earliest examples of a music recommendation engine I can recall. Marek Gibney's Music-Map was the earliest incarnation of his Gnod (Global Network of Discovery) engine. Enter an artist and it will visually cluster related artists in a text cloud.
Give it a try!
Gnod.com went on to expand and now includes recommendation systems for art, film, and literature, and has a fantastic visual product mapping system for users shopping for smartphones, tablets, and other devices.
I'm a big fan of discovery utilities, and I'll be giving the literature engine a try this evening for classic dystopian fiction and for music non-fiction.
While I usually swear by rating aggregation systems like
metacritic and
rateyourmusic, Marek's project has a simple but effective interface and the interactive cell phone and hard drive maps are impressively useful.
Have at it!