So I tried Shaman healing in heroics for the first time post-patch, and for some reason it all now seems to click with me. I think the addition of Healing Surge as a big fast "oh crap" kind of heal just made a lot of difference for me. And for whatever reason, hitting Healing Wave the rest of the time seemed to work just a little bit better. And whatever mana issues I was having before have completely disappeared.
So, I ran a few helping a friend gear up his hunter and it all seemed to work well. I've also been finishing up the Wrathful set on my warlock - just the belt and boots still to go. I also have been putting off finishing up the last few gathering professions on my various toons, so I really need to focus on that over the next few weeks so I get them finished before December 7th so they're all ready to go for Cataclysm launch.
Also ran the pre-Cataclysm quest chain on my warlock. Was very disappointed that, at least for Horde, the quest chain ended with instructions to go tell Garrosh, because he'll be able to fix it. How about I go tell this sign-post, or that campfire instead. I think that might accomplish more. Or maybe I should enlist Gamon's help - seems like that might accomplish more as well. But Garrosh - please! I'd rather sneak into Stormwind and tell Varian Wynn.