The same team that brought us the 3.95 GEN has decrypted 4.00 OFW.  They took a peak at the resource directory in 4.00’s flash0 and found some PRX changes.  The team found that these changed PRXs are pops, popsman, npdrm, np9660, mlnbridge, sysmem, umdcache, sysconf, and video.  They also saw that the NIDS have not changed.

They conclude that it should be no problem to develop homebrew on the new firmware so we will be keeping our eyes peeled for 4.00 ??? CFW.