Gizmodo dug up the FCC filings for the new PSP, PSP-2000. Isn't that the greatest model number ever? The manuals and such have a bit of new details buried in them which they, and I, were able to dig up. Most importantly though, are the specific size and weight details:
The current PSP is 170mm x 74 mm x 23 mm and weighs about 230 grams with the battery in, while the new PSP is 169.4 mm x 71 mm x 18.6 mm and weighs 189 grams.
The new PSP (PSP-2000) doesn't come with a Remote Control and you can't use the original PSP's remote with it.
You can charge the PSP with a USB cable. (It takes about two hours, 20 minutes to charge with AC and five with USB)
Display button: Pressing it changes between three levels of brightness, holding it for more than one second turns off the backlight and holding for more than five switches to video output.
Its TA-085 PCB motherboard is homebrew-conducive.
The battery has been shrunk from 1800mAh to 1200mAh, but retains hour rating.