I went to ICC raid for the first time ever on any toon last night.
Sadly not on my hunter, on my druid.
To tank.
I've not tanked since 4.0.1 hit - I had to log to it, put together a tank kit from my bags, make up a spec, visit the trainer so I actually had bear form, and load my action bars. New abilities, changed old ones (maul's now an instant, swipe has a cooldown, WTF is pummel? etc etc).
I should also point out this character has T9 only, maybe 2 bits of 232 stuff too - the last thing it tanked was back when ToC was big news. In the last 12 months it has been brought out about 35 times to do enchants for my hunter, and once (two months ago) when it tanked a heroic.
So I went in with my massively forgiving guild, got constant tactics whispers from the other tank, and we downed... erm, I don't even know the bosses' names! In the first-four achieve we killed 2, 3 and 4 (I wasn't there for 1), which includes the gunship. We killed the professor (good news everybody!), we killed the blood council (apparently)...
It was bloody brilliant fun, but I was sh*tting myself the whole time, terrified I'd be letting the guild down. We had one wipe because at the council, the purple-orbs chap could one-shot me from full health if I missed an orb, but swapping tank roles we were just fine.
If anyone who knows these things wants to check out which bosses we actually did and/or what gear I had on, the character is Mockingbird on Azjol-Nerub. You can also see the chest, boots and weapon I picked up while in there
I'd link em but armory is inaccessible from here.