PSP news has been quite slow within the recent months since the Vita is up and running. Earlier this month, a new exploit was discovered by Xerpi. Today, Zer01ne has uncovered a new exploit for the PSP which uses a game that has not been used by previous exploits.
The exploit works on the latest 6.60 firmware. The bad news however, is that Zer01ne is not planning to port wololo's Half Byte Loader to work with his exploit. It's probably not needed at this point as there are already custom firmware installers that can be ran directly on 6.60 without having to do anything extra.
Below, you can check out a video of his exploit in action:
On the flipside, this exploit is working on the Vita and VHBL will be ported to work with this exploit. You can follow Zer01ne on Twitter for more updates.

http://psp.dashhacks.com/2012/03/19/...ing-eggsploits