Four of my team (pally tank, 2 x sham, mage) dinged 70 2 days before wotlk and had lvl ~65 instance blues. My last dps is my boomkin which is badge geared. Their current stats (with 3-4 quest upgrades) are: pally 12khp/13karmor/470 def, new dps: 500sp,15% crit, 0 hit, boomkin: 900 sp (new badge gear, no enchants or gems, and I forget what hit/crit he has).

UK - after 2 nights learning I can clear it in 45 mins. Had to spec 1 shaman resto to clear the 2d and 3rd bosses.

Nexus - starting tonight, but I've run with my pally in regular groups and I'm only worried about the mage boss (and you can't activate last boss until she's dead). That's OK though - the loot table sucks, the BEST part about nexus is the quest rewards, and you only need to kill the void boss to complete all of them.

I also ran the first spider instance (anzol something?) with a normal group, and I think I can do that at 73 np, quick and easy zone.