No, don't look for helpfiles. There aren't any. You can't choose these edges; they're immortal-award only. You get them for being a cool member of your cabal, furthering its goals, sticking it out consistently against the odds and beating ass, etc. Basically whatever it takes for the immortals of your cabal to think you deserve a little perk.

In short, about 30 or so new edges that mostly make cabal power X work a little better. They don't exist for every cabal power, but there are enough that there are at least 2-3 choices to give any caballed character. (Yes, even Heralds have cabal-unique stuffs ready.)

As mentioned before, there are no helpfiles, so if you get one and the explanation on your edges screen doesn't give you the gist of it well enough ("Oh, so this makes Nightfist better."), pray and ask.

I think that's it. They'll be available to hand out next crash/reboot or so.