Apologies to the moderator.  Forgive for cross-threading.  I have no idea where to post this - I'm a ReadyNAS NV+ user using TwonkyMedia 4.4.11 with an iTunes 9 problem.  Can you see your iTunes 9 playlists with TM on your ReadyNAS?
Please refer to the URL below to keep replies in one place.  Thanks!
http://www.twonkyforum.com/viewtopic.php?f=3&t=6889