None of this thread is relevant to the original question. My 650 does not appear to implement the phone profile "services" necessary for the Address Book functionality. The Bluetooth preference pane specifically lists syncing (SyncML, I presume), "use with address book" (dialing, sending SMS), and DUN... each of these remains disabled (I haven't installed the DUN hack yet)
You can see this screen (with DUN enabled) as part of Trevor Harmon's excellent howto:
http://vocaro.com/trevor/treo-dun/Bl...h_services.png
I'm quite disappointed that my Treo is less featured (regarding BT) than the ubiquitous cheapo Sony Ericsson phones.