I think the main problem is that as mobile phones become more powerful, they'll also become bigger targets for troublemakers. First spam via SMS, now Viruses via Bluetooth.
On the other hand, from what I've read a potential victim's phone will display multiple warnings when Cabir attempts to infect it. So be cautious, and you'll be save (for now).
If your phone does get hit with Cabir, you can find the removal instructions at Symantec's website:
http://securityresponse.symantec.com...poc.cabir.html