According to a poster on the PSPChina forums, the above is a "design sample" of another iteration of the PSP. The poster claims this information comes from a "reliable inside source" and that Sony had already finalized this basic design by the end of 2007. The only new addition so far is a built-in microphone, but otherwise the size and shape is the same as the PSP-2000. The Home button has been replaced by a PlayStation logo button just like the PS3 controller. Also noted is the hole between the volume buttons and the PSP logo, which the poster claims is where the microphone is located. The size of the metal ring has been reduced, allegedly to reduce scratches on it.
The poster claims he doesn't know the actual model number of the this PSP -- it could be a PSP-2100 or 3000 or something else entirely. "The pictures are actually of a design sample; whenever a new system is to be created, designers will follow Sony's instructions in creating several different versions. This is one of the versions that was created and then discarded. Next year when we buy this PSP, it will be slightly different, but I believe the microphone and smaller metal ring will remain."
Another set of pictures shows a black version of this so-called PSP-3000. The PlayStation button is slightly rounder and larger. The poster admits that the final design of real PSP-3000, or whatever the model number happens to be, is still unclear. Basically, even if everything this dude/dudette says is true, what we'll be seeing on store shelves might look completely different, assuming there is even a redesign in the works. Six more pictures after the jump.