You can use Tier 2 code to access bluetooth but there are currently no AppGameKit commands for using BT. If you are a Tier 1 user you can probably edit the interpreter to use BT commands natively too. If you were looking for bluetooth commands specifically from AppGameKit it might have been worth checking before purchase, sorry. As far as I am aware there are currently no plans to add bluetooth commands into AGK.
Personally I would like to see them added but you are actually the first person I have seen requesting them.
If you really want this added I suggest you put a feature request in here:
http://code.google.com/p/agk/issues/list
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