With the 1.4 update, Media Sync Mode is optional (setting under "Device Info" preferences).
With J. River Media Jukebox, you can use either USB mode or Media Sync mode. Both treat as an ipod (rename to Palm Pre in program if you want) and sync your playlists created in Media Jukebox. Advantage of media sync mode, brings album art. USB mode can't bring album art and I haven't figured out why not.
I use iTunes 9.01. I have it and it works great. There are plenty of sites to get that version. Just check the forum using search feature. I tried Media Monkey and Doubletwist. iTunes is still better in my opinion.