Update: Kotaku caught up with Perry today and he said he know someone who's working on it. Take a look.
Acclaim boss Dave Perry has backed up a tweet earlier today on the lack of UMD support in the heavily-rumoured upcoming PSP revamp, saying he's "certain" the disc's out of the new design.
"I can't reveal my sources, but you can be certain there's no UMD, which means fully digital online device, and you know I know people," the exec told GameDaily.
For the record, he's right. Hit this for the latest on PSP-4000.