Always the innovator, Brando has released this ultra tiny form factor Bluetooth dongle.  The entire device is barely larger than a standard USB connector!  I suspect this is done just so there is enough to hang onto to remove it from your machine.

This tiny device packs a punch with V2.0+EDR support, and a working range greater than 10 meters with a 723 Kbps data transmission rate.  Further it complies with Bluetooth 1.1 and USB 1.1 specifications.

Specifications: 

* Connect to most Bluetooth devices
  * Support A2DP up to 30 feet (website says meters but this is a Class 2 device)
  * Enables connectivity to 7 Bluetooth devices at one time
  * Enables Wireless Personal Area Network (PAN) connectivity
  * Bluetooth 1.1 compliant
  * Bluetooth class 2, compatible with Bluetooth class 1
  * USB 1.1 compliant
  * More than 33 feet wireless networking range
  * Up to 723 Kbps data rate
  * Super mini and slime size, easy to carry
  * Dimension: 14 x 19 x 6mm (approx.)
  * Weight: 2g

Requirements:
  * Notebook or desktop computers, with 500 Mhz CPU or higher, 256 MB RAM or higher, 50 MB of free hard disk space, and one free USB port
  * Mac OS 10.1.4 or later
  * Windows ME, 2000, XP, Vista

Available now for USD$24.00 from here.