If you have a Cingular cell phone with Bluetooth, you can use it as a modem to allow the Nokia 770 to get online. If you have EDGE connectivity, do the following:
Set up the phone based on the questions initially asked when creating the connection.
Go to Apps/Tools/Connection Manager
In the Connection Manager menu, select Tools/Connectivity
Press "Connections"
Either create a New Connection or edit your current "Cingular Internet" connection.
Using "Packet data", click Next.
Type the following settings:
Access point name: wap.cingular
Dial-up number: *99#
User name: WAP.CINGULARGPRS.COM
Password: CINGULAR1
Click Finish.
Warning: you might want to get the $20 unlimited data plan offered by Cingular, as they charge $.01/KB of data. Also, tethering this device might be in violation of your service agreement, so make sure you check on that.
I'll collect this information sooner than later, but for now, you'll basically do the same thing as above, except change the access point name, dial-up number, username, and password. You can probably find all of this information by searching Howard Forums.