I have just about run the cambit of stuff that I can multibox so a guild mate and I both joined a raiding guild.
My guild mate used he boomkin and I used my resto shaman.
It's a pretty good guild but let me tell you healers are in short supply

so in about 5 days in the guild I've been tied to every Northend 10x and 25x raid in the game except Malygos and I think we are supposed to try him tonight.
I helped finish the last two wings of Naxx and it was all very successful. ( although I didn't get any gear yet )
I get non-stop begs for healing heroics but I can usually get people to agree to do the instances that I consider hard to multibox so that's cool.

I'm almost afraid to logon with my resto shaman now for fear I'm going to be asked to to help someone.
I just forgot how much work a regular guild is.