No, this is different. geohot compromised metldr, fail0verflow did the other loaders. geohot's exploit is different, no one but himself knows how he did it (not even fail0verflow).
No, the only thing that wasn't known was how he dumped metldr. This is a relatively insignificant part of the whole thing and wasn't what fail0verflow was focusing on in their research (as seen in the video).
The only reason that he was able to do anything with his dump was because of all of fail0verflow's work. See the twitter feed of marcan42 for clarification.
Actually, since the beginning, geohot's ps3 trick was just him copying what fail0verflow had done on the wii (glitching the address bus). He didn't give them credit for that either.
