Sorry to dig up this thread, but now that the device has been released and some people have beta units, I wanted to confirm the tethering info.

I want to tether an N900 to my Blackberry as a client. (i.e. use my BB data plan, no SIM in the N900.) Can the N900 act as a DUN client, and is the software native? Also, can it be done via Bluetooth, or must it be done via cable?