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Top idea.
This Web 2.0 lark is starting to get exciting. I installed AjaxAMP today and am already listening to all the music on my home computer at work. With an iTunes version apparently on the way this could become the future of music file sharing.
Pros: Lets you listen to your tunes from anywhere
Dead easy to set up Cons: Possible security risks?
Only available for Winamp at the moment