These questions have largely been discussed. And yes, waiting for the spreadsheet is the correct solution if you want more information than has currently been discussed.
So is the 5% HfB damage reduction and poison damage nerf active right now or will it start to become active after the next maintenance window? Are the combat and mutilate specs now even with these nerfs? Many have suggested on the blizzard forums that there would be a mass exodus to the combat spec for serious raiding rogues, does that seem likely? I guess these questions may be answered in the upcoming versions of the spreadsheets.