Our pals at PSP Vault have posted the details of a review of a Bluetooth Adapter by a Japanese site, heres the info in English.
<blockquote>A few highlights from the review:
-The adapter fits underneath the PSP quite well, and has two protrusions that slip right into the speaker holes on the bottom of your PSP for added stability.
-The package includes a USB cable (for recharging) and a 2cm stereo extension cable.
-The adapter is only one part of the package -- the company plans on including stereo Bluetooth earphones in one of two styles: neck band or ear-hanger.
-Audio quality is on par with that of the original PSP earphones
-There are no controls on the headphones (or a connector for the PSP remote), but they do have volume adjustment
-Reception is good; he said there were no problems when he inserted the transmitter into a nylon bag, and there were no problem when he walked into the next room (but left the door open)</blockquote>
Could Bluetooth be an option for the PSP Homebrew Scene in the future