iTunes 9.0.3 is out now for download on Software Update and in the usual places. The update features the option to remember your password when purchasing items in iTunes (finally!), fixes problems with Smart Playlists and podcast synching on iPod, and resolves a few bugs and issues. There's no word of any updates in compatibility for iPad, but it's probably just too soon for that yet.
That "remember my password" fix will definitely come in handy, though. Get it while the gettin's good!