I'm of course going to play around in instances and heroics till Wotlk, but my main focus atm is getting myself ready with my utility characters and such in preparation for the xpac. I'm leveling up 3 teams atm pretty much simitaneously to have all my bases covered and at 70 ready to go rather than gearing up 1 team as much as I can just to have most of that gear replaced once I hit 73 or so.