Hi,
I use a BT adapter in serial side. Several advantages without cables. Axim has a BT serial profile. That way I can control my telescope, gps etc.. I have no reason to believe that it will not work as a terminal. I use Aircable. You can put some batteries (you must make your own adaptor), or buy a small transformer and you have a standalone serial (up to 115kbps).
Take a look in their site
http://www.aircable.net/
Paulo