Hey guys,
I've just been messing around here with a cheap bluetooth to serial module, trying to add wireless capabilities to the Arduinoboy. I've got it working, but it misses notes if you play too fast. I'm not sure if it's a latency issue or some kind of flow control issue.
Either way, here's a video that explains it more:
For more info, check out my blog post: http://catskull.net/bluetooth-arduinoboy.html
If you'd like to buy an arduinoboy, they're available on my website starting at $16 for a kit. Check it out: shop.catskull.net