Along with the myriad of bluetooth products creeping onto the market is the 'Free2Move serial bluetooth' device.

http://www.free2move.se/prod_spp.htm

I've seen someone's project where they have replaced their onboard IR sensor circuit in their empeg with bluetooth. I can't recall the application... Maybe more range...
Anyway... With this consumer plug-in device on the way, and bluetooth GPS units, pocket pc's, chatpens, mobiles, modems etc all happening... Anyone got any thought of applications for use with the empeg/rio?

Cheers,

Kieran