In the past few months the PSP Hacking Community has alot of people working on exploits and also ISO/CSO loaders.
Wololo :
Patapon 2 Demo Exploit (5.03^ <-> 6.20)
Golf Exploit (6 Games) (6.30, 6.31) :
Everybody's Golf [EU]
Everybody's Golf 2 [EU]
Hot Shots Golf : Open Tee [US]
Hot Shots Golf : Open Tee 2 [US]
MinnaNo Golf [JP]
MinnaNo Golf 2 [JP]
Another (UNKNOWN) Exploit Coming Soon for 6.35
TN (Total_Noob) :
*** = NOT RELEASED YET
# = Discontinued (not working on it anymore)
***# = Don't know whats gonna happen
6.20 HEN ***#
6.31 HEN #
6.35 HEN ***
