Patch 4.0.3a (most likely) this week
As far as I know, Patch 4.0.3a is still supposed to be deployed this week but I'll wait a little longer before I go crazy on confirmations and super huge front page posts.
Rested experience will be reset at launch. You will start at 0 rested.
Cataclysm Factions Pages
I wanted to wait the release of Patch 4.0.3a before pushing the rest of the Cataclysm content to avoid confusions on what is/isn't released but I assume that factions pages won't do any hurt. This is a first draft, I might add more information before the actual release of the expansion.
honestly i think it'll have to be this week, give people 2 weeks to try the new race and class stuff, the closer it launches to catas release the more stuff people have to do before they have to buy cataclysm and 2 weeks is about enough for everyone to level a new combo and explore the areas and then be left chomping at the bit for cata. Remember they want everyone to be waiting on cata, if just a few days ago we got a bunch of new shit for free the numbers for day 1 sales might not be as high because everyone already has new azeroth and a new character to play with.
Am I the only one in the world that could wait for Dec 7th for the Shattering? Release day is going to be much more 'meh' now. Midnight of Dec 7 is going to be "oh hey I can fly in Azeroth and go to Hyjal" etc.
For many of us not in the beta, the Shattering is in effect the expansion launch. Sure there's no 80-85 content and no Goblins/Worgen, but the meat of the expansion will probably be two weeks before launch. Just won't make launch night as epic.