NewEgg.com has the Asus USB-BT21 USB 2.0 Mini Bluetooth Dongle for $9.99 (19.99 – $10 coupon) with Free Shipping for a limited time. To get discount, use coupon code: EMCMLMS44 at checkout. Coupon expires October 21, 2009.

The Asus USB-BT21 creates a wireless Bluetooth connection via high speed USB 2.0 port. This dongle features Bluetooth v2.0 + EDR compatibility, printed antenna, support for maximum data transfer rate of up to 3.0Mbps, wireless functionality up to a range of 10 meters in free space, A2DP support for wireless stereo music playback, and compatibility with Windows PCs and Macs.