I only saw one post on it and it had no answers.
http://forum.thegamecreators.com/?m=forum_view&t=185928&b=41
its a sad post i know, but also would like to know the answer to that question.

We have no plans to support bluetooth at the moment.

Couldnt someone use tier2 to implement it?

In Tier 2, you can do anything a C++ programmer can do, just remember that you'd have to write support in for every platform you want to support (i.e. the dependencies and external libraries may be platform specific).