Xilisoft iPhone Transfer
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Full user review
"Poor choice -- clearly just a work in progress"
The music file transfer worked OK, with my third try (it locked up a couple of times first).
This software (at least currently) doesn't support transferring playlists (as opposed to just the music files within your playlists)! So you literally have to recreate all your playlists after you transfer your music. Not up to par; there are better alternatives out there. It's not yet clear to me that album artwork, etc., will transfer either.
Little more than a work in progress. Until it allows you to transfer/manage ALL aspects of iTunes, it isn't up to its competition.