I messed around a bit with Yahoo! Music Engine tonight, which I haven’t had nearly enough time to play with.
The one that inspired this post was Ian Rogers‘ MusicBlogs plugin which lets you pick a playlist and publish it to a public RSS feed on his musicblogs site. The RSS feed contains links to XSPF files, also published on his site. Since XSPF is a sharable playlist format, you can load one (like the one below) into Yahoo! Music Engine and if you are a subscriber to Yahoo! Music Unlimited, you can hear the entire playlist (if you are not a subscriber, you can listen to only 30 second snippets).
That’s really cool!