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Although simple -- and still in the beta stage -- Musikki is an odd delight to use: Simply search for a band to surface videos, tweets containing the band's name, Last.fm events, bio, discography and photos.
Also -- and this is probably the coolest part -- the service suggests similar or related artists. A search for "Total Slacker" reminded me of the existence of Philip Seymour Hoffman (the band), which I promptly downloaded.
One can also share band search results via Facebook and Twitter.
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Again, Musikki is nothing fancy at present, and still appears to have some bugs -- a search for "Man Man" delivered The Tallest Man on Earth's discography -- but it's definitely an amusing way to cruise for music.