Dark Alex is gone, or at least he hasn't done anything since 5.00 M33 release. It's all about Team Gen and Yoshihiro, though Yoshihiro might quit because of M33 fanboys, and Team Gen said they had no plans on releasing anymore CFW. The PSP scene is slowly dying, even though they found 3 new exploits recently that works on all PSPs (including Go).
If you want the latest CFW, its the 5.50 GEN-D3 which decrypts most of the recent games (As far as I know, KH:BBS, and God Eater are the reported non-working). Sony and game developers got smart and put security checks on the newer games, and only 5.50GEN-D3 decrypts the game for you, otherwise you will have to find the patched ISO or patch it yourself.
Be careful where you buy your Pandora and magic stick, some places rip you off. I don't know any sites either, I made one myself back in the day.