I didn't know about that Framaroot thing. Seems like it'd be easier if it works. Haha. I rooted it by flashing a CWM-based kernel for i9000 in Odin, rebooting into recovery and flashing one of the JB kernels for i777, and then downloaded SU from the Play Store. That long, convoluted method works if Framaroot doesn't.
Odin flashable version available in the Download Repository. I may create a stock plus root version sometime in the next week, but I'm too busy for the next couple of days to even think about it. Haven't heard if it can be rooted easily; no one has talked about it. If you're adventurous, you could try Framaroot and let us know.
Looks like there's a Release Candidate for CM10 for my i777. I'd like to move back to CM from the official 4.1.2 I installed with Kies awhile back (the AT&T / Samsung 4.1.2 has some battery life, and occasional lock-up, issues for me).
I used Creepy's excellent "How to Flash Custom Binaries Without Ever Incrementing the Flash counter!!" instructions to go from the phone's orig Gingerbread to CM9 earlier, and it worked w/o a hitch. Can I just try that with the current ROM ? or do I need to use the "return to stock GB method" before that ? (i.e. are there any issues I should be aware of with getting my i777 with this ROM to state where I can do a CWM flash of CM10 )