http://ir2bt.com/
http://www.engadget.com/2008/03/28/ir2bt-infrared-to-bluetooth-converter-now-on-sale-ps3-owners-re/
$55 and they've already sold out their first run. They are planning to make more though. It can be powered by a miniUSB adaptor or a pair of AA batteries.
They're planning on selling 100 a week so it may be awhile before you can get one as they're not taking pre-orders or doing any kind of waiting list.
Mods, can this be posted in more than one place? I think it's something a lot of people have been waiting for and no I receive no compensation for the manufacturer, I just happened to catch it on engadget.com