Did anyone think to perhaps put together an emulation application, that they can run the 2.0 / 1.52 updaters in? Using this, they could possibly find the digital signature using a cryptology method or two?
Pardon my thinking out loud, but, I code MUDs as well as online games, and one thing that all my programs need are methods of cryptology, to prevent others from opening a file on the server side to plainly see someone's password, or their PII (personally identifiable information). Not unlike Sony's want to prevent the PSP's password from being discovered so they can prevent home made applications...
If the digital signature that Sony uses is encrypted, perhaps it can be decrypted using an emulator that's specifically designed for this purpouse. It runs the updater eBoot, emulates the hardware/firmware of a real PSP for the eboot file, and perhaps it can even decrypt the signature when it is sent for the comparison/security check?
Does anyone out there think they could possibly rig this up?