Looking for a special bluetooth transmitter.

Have any of you guys heard of a small bluetooth transmitter that I could program the ID of and set it to always be discoverable? Some have pointed me towards some Arduino boards, but I think that might be overkill.

Another idea I’m pursuing is not even changing the IDs as long as they’re unique and having a lookup on my phone app. Does anyone know if this little guy’s ID is unique?

http://www.sparkfun.com/commerce/news.php?id=282