According to CVG, third-party peripheral manufacturer Logitech are working on a UMD add-on for the PSPgo
No release information was given, but apparently the device plugs into the PSPgo, allowing users to play UMDs on the UMD-less portable. Apparently the device will make the handheld a little more "bulky", but works fine. Logitech's UK...
Here's a wireless Logitech guitar controller
It works with the PS3 and PS2. It looks kind of swish as far as these things go. It costs $199.99. Can we go now?