Team PRO just released the B9 version of its Custom Firmware now available for every model of PSP.
CHangelog:
[+]some bugfixes and code optimization
[+]support for PSP Go Video mount
[+]fixed a bug in Inferno/SonyNP9660 when enter sleep mode
[+]updated decryption component, 6.20/6.3x add future support for encryption type PRX version 6.60
[+]added compatibility to future game requiring 6.60fw
[+]added 6.60 version (theorically sopports 11g module)
[+]added option 166/83 frequency of CPU
CHangelog:
[+]some bugfixes and code optimization
[+]support for PSP Go Video mount
[+]fixed a bug in Inferno/SonyNP9660 when enter sleep mode
[+]updated decryption component, 6.20/6.3x add future support for encryption type PRX version 6.60
[+]added compatibility to future game requiring 6.60fw
[+]added 6.60 version (theorically sopports 11g module)
[+]added option 166/83 frequency of CPU