Howdy -
For the Great Global Hackerspace Challenge, our Pumping Station: One team is building a biosensor array. The array consists of sensors placed around one's body connected to an Arduino also attached to the body. Software running on a computing device like a laptop or smartphone will visualize and log the biosignal data. We decided the best way to connect the on-body Arduino to the computing device is via Bluetooth.
Here's an overview I shot of how to interface an Arduino with a Bluetooth module. I have more technical details and gotchas in the blog post I wrote to accompany the video.
Cheers,
Drew