The PSP modder known as Foo returned to give us an idea of his latest project, a PSP with a custom controller and LED VU Meter.
According to Foo:
This is my latest project. In the beginning I started working with micro techniques, but then I did the XBOX 360 "rapid fire controller" and I thought to use all my skills in lighting for the PSP that would make a very good start. Even I do not have to use extra buttons.
This is pretty impressive. You can find more information about this project and other products Foo here.