Sony has released the third firmware release in as many weeks today, with version 3.02 being available for download.
Sony PSP portal YourPSP.com list updated features (sic) for 3.02 as
nothing more than a security upgrade addressing a "security
vunerability".
The recent release of PSP-PS3 connectivity in the
previous firmware releases could well be the reason for this firmware
patch, although no specific details have been released.