I was burning some time online a few days ago, and I came across this discussion on FriendFeed about last.fm versus Pandora.  In the thread, this was my contribution:

.. last.fm and Pandora are both great but, like Twitter and FriendFeed, have completely different goals. Pandora works behind the scenes to tailor a stream to you. last.fm throws everything together in a huge pot and gives you the sliders to make a great listening experience. They call this "scrobbling" (actually, the AS in LAST stand for "Audio Scrobbler") .. anyway, like a stew, the more stuff you put in it the better it is. Add a bunch of people, hook up last.fm to your itunes, go nuts!

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Don’t get me wrong, I love last.fm. It’s a great service. I don’t think any other product comes close to providing the same functionality of building a music profile and then matching it against other users. No, that part I have absolutely no problem with.

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