Finally chatted with Peter this evening, he shared with me his updates to the code for his HAB project. Perhaps I should get back into it as well.
I tested the serial bluetooth boards last night, and I found an Arduino sketch that worked with the AT-09/MLT-BT05 boards. Turns out that all of them are slave-only boards, still useful but not what I thought I was getting. Still have not gotten the HC-05 to work completely, but that sketch I found does not seem to work with it, even if I put it in command mode. Perhaps I damaged it while I was experimenting.