TechBlog has put together a list of the top 5 most creative uses for the Sony PSP.

The list features the PSP Robot Remote, Analogue Joystick, PSP Keyboard, PSP Motion Sensor, and the PSP Phine.

I’d not come across the PSP Phone mod before :

Though currently unable to make outgoing calls…PSPhone is also capable of communicating over both CDMA & GSM cellular networks. I’m still working on how to resize it and get it into a mass production.
The pack will contain:
* X1 antenna
* X1 board
* headsets with microphone
* X2 wires
* X1 32 mega memory stick
The antenna to connect to the local network. On the board will be a switch to switch between CDMA network (without sim card) and the GSM network (with the sim card). The wires are to connect the board and the antenna to the PSP. All will cost approximately more or less than $60

The TechBlog site has a few video clips of the mods mentioned, so its worth taking a look.