I'm signed up for Cingular's Laptop Connect service, and can successfully tether my laptop to my Blackberry 8700c via a USB cable. I'd prefer to tether via Bluetooth but Cingular's tech support wizards are telling me it's not supported. I'm paying the extra $30/month for the tethering capability, and don't understand why Cingular should care how I make the connection to my laptop.

I'm using Cingular's Communication Manager software v 5.2.

Any tips out there on how to make this work?

Yes, a simple and easy to follow tip:

You can not use the BT as a modem on your BlackBerry. So the tip is don't waste any time on this...