I'm in a guild that I enjoy, actually run by a couple of UT Alums, and we run a casual flex raid every Friday night. If anyone is interested. I think right now we need healers and/or dps although we might be able to shuffle spots for a tank.
I will tell you in advance, it is VERY casual, we almost never start on time, and we die a lot, but we treat it like progression and try to figure out what went wrong a few times before we look up the solution. We have 8 or 9 good players, we're still working with one or two to learn their class, and we usually end up pugging one or two. We use ventrilo, there is profanity, but everybody is pretty friendly and laid back, w won't kick you for standing in fire.
I'd also be interested in something a bit more structured or making better progress. I play healers almost exclusively, and I think I'm decent.
My battletag is CaldusAuch #1352. Add me if you'd like to try raiding with us or if you would like a healer for your own raids.