The crew over at the Droid Forums has a working root that'll get you up and running on Android 2.3.5 Gingerbread, which is awesome. But it comes with some caveats: There's no recovery tool, so if you screw up, you're borked until restore files become available. Also, it's only available on Windows, though that's probably not tooo much of a problem for most Android enthusiasts.
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"though that's probably not tooo much of a problem for most Android enthusiasts."
Funny thing, the two most adamant android users I know are also mac users.