Have used a Gigabyte bluetooth adapter and Nokia 3650 phone successfully. No problems at all.
There is also the D-Link adapter, which is the one Apple sells on their online store.
Bluetooth for your palm. Good alternative for transferring documents between two computers when no other network exists. Use your mobile phone as a wireless modem to go on the internet. There are the new bluetooth wireless Apple keyboard and mouse.
I tried this feature... when my family renewed our plan, they gave me 3 free months of internet access via my phone. And it works just fine. slow, but fine.