The new firmware found on the PSP-2000 a.k.a. PSP Slim has already been dumped, with the help from Dark_AleX. Homebrew coder Mathieulh has succeed in dumping the files directly from the flash0 directory on the PSP, with the assistance of Dark_AleX.What makes this news so interesting is that it could now be possible to hack the firmware or even developer a custom firmware.
Dark_AleX left the PSP scene a few months back but could be returing to the homebrew scene. It is unclear exactly how the firmware was dumped from the PSP. Since the firmware is not available to download online, this does indeed seem legit.