I've been out of the scene for about half a year and have a kmeaw 3.55 PS3 phat.
I recently saw that 4.21 has been 'jailbroken' (not sure if this is the proper term for it right now) and I'm seeing a lot of new CFW. The one that stood out to me is Rogero's 4.21.
My question is:
1) Which one should I install?
2) How do I go from my kmeaw 3.55 to CFW 4.21?
3) How much work and re-downloading of EBOOTs am I looking at, once I update to 4.21?