Yes, Molten Core. One of the most popular raids. Either for how fun it was or all the horrible wipes that occurred in that raid waaay back in the beginning of Warcraft. Even though its a low level raid, there are plenty of bosses and mobs to gang up on us. :3
Here's the website that has info on all the 10 bosses, maps, gear list, videos on how to solo or run MC in general and links to complete the quest Attunement to the Core. Trust me you'll want to finish this quest up so you don't have to run through everything to start a raid.
I look forward to running with everyone on this upcoming raid this weekend. :3