Though not quite cutting edge, Boyounb Tech has come out with a product that will allow you to use Bluetooth technology for a handsfree cellphone headset without a Bluetooth-compatible phone. The product includes a bluetooth dongle that attaches to the ear phone aperture of your cellphone and comes in 4 colors with matching dongles. Runs for about $120 though if you want to use it with a Bluetooth phone (and without the dongle) it'll cost you $60.

Bluetooth headset that works with a non-Bluetooth phone!? [Phoneyworld]