My former boss took the plunge and is actually now doing what she always wanted to do -- studying bat behavior. Read more about it at her Bat-i-licious BATGRRL blog.
I had read about such things, but this is the first time that someone I know has actually done this.
Such study is certainly off mainstream. In fact I first misunderstood it as some form of bio technology, and was promptly corrected by the BATGRRL.