I used a CAI 302 with a serial to Bluetooth converter I got from US Converters (usconverters.com) and a cable I made. Running XC Soar on a Dell Streak worked pretty well. I had a few signal drops, but not many and reconnecting thru XC Soar was rarely an issue.

Sold the CAI 302 and adapter last week, but I have a K6BT for sale if you are interested.