By the time you've reached 80 you should have a BiS list compiled and know exactly how to acquire it. Info on gearing can be found here: http://www.wowpedia.org/Herald_of_the_Titans. Despite the posted info there is apparently an error (or was) where certain ranged items still had to be ilvl 226 including wands, err on the side of caution when building your gear lists.
We will be running 2 tanks, 3 healers, and 5 dps. Please choose and level a class you are comfortable playing in a raid scenario and keep in mind that while it will almost certainly be easier than it was prior to Cataclysm, there will still be a good bit of work and wiping involved in clearing this. For anyone rerolling as Alliance or on this server specifically to get this achievement, we will do our best to make sure everyone is in the best gear and enchants possible.
Jamjacket - Paladin
Antymony - Death Knight
Interested players should post here or send me a tell or in game mail on my death knight (Rusthole) or on my paladin (Jamjacket). It will be first come first serve with possible exceptions being made for people who come late to the party with fully prepped characters. There is no specific timeline on this so please give some indication as to how soon you expect to be level 80 and ready to run for gear.