First up is the PSP Mouse / Right Analog thing I designed yesterday.

Basically it would be connected through the USB port, it has a built in gyroscope which can be tilted and used to control the cursor while web browsing, or even for games.

I like the design of it, I think it looks pretty sleak, I supposed it could also be connected to the remote/ headphone port, but USB is probably more responsive.

The problems with this is that it makes it hard to hold the PSP in the one hand and this in the other. My guess is you'd probably operate it while the PSP is on your lap or something. On another note, I have one of those PSP recharger grips, which looks something like this:

http://www.proporta.com/F03/i/rechargegrip1_web.jpg

I suppose if you attached half of something like that to one side of the PSP, then you could be able to hold it more easier and use the mouse while standing up.

Also, it does somewhat resemble the Revolutions controller, honestly this was completely unintentional. In fact I got the idea from my gyroscpic mouse, a Gyration ultra.

Another possible problem is that, if Sony were to make something like this, it would be an additional peripheral you'd have to buy extra, if it was used exclusively for certain games, that is (like the original dual shock for playstation did). However just using it for browsing would be good.