I just got the following from Motorola Share.
"With My Media Play, you can access your entire music collection of MP3 and WMA music files stored on your computer — and play those tunes on any other computer or Windows Mobile 5 device. Finally, you're freed from limited play lists and synchronizing your mobile device — just access and enjoy!"
Motorola Share is a service from Avvenu that allows any device (phone, PDA, PC) access to files on a remote PC. Like getting access to your home MP3s at work or on the road. Or your photos, etc.
The link to sign up is
http://direct.motorola.com/hellomoto/share/
And it's free