First up, my armory link. I have never before been one or even remotely considered it. I do not particularly like it (being constrained to a mana pool is not really my thing), but it's going to get my foot into the raiding door in Wrath, so it's worth a shot. I am a somewhat experienced and competent bear, just for some background. My guild is short ranged DPS, good on tanks, melee DPS and OK on healers.
I hit 80 just before Christmas. I ran my very first level 80 heroic just the other day. I have been using the gearing guides here as well as some other sites, in particular EJ. While my gear is not spectacular after starting with old 70 resto gear, it has improved drastically through some cheap BOEs and a few quest rewards. My main concern is having a good mana and damage efficient rotation (I am specced 3/3 Eclipse) which I can optimize on the training dummies (some of the best items in the game, IMO). After a few rounds on the dummies, the longest I've been able to go without using a mana pot is just shy of 3 mins 30 seconds (including a self-used glyphed Innervate). I'm holding about 1650-1700 single-target DPS without any elixir/flask or well-fed food and just my own Improved Mark. That seems low to me, but is it?
I am using for glyphs:
Major - Moonfire
Major - Innervate
Major - Starfire
Minor - Unburdened Rebirth
Minor - Wild
Minor - Challenging Roar (don't ask, probably because there really aren't any other minors?)