Easy list. There's "The Eternity Vault" and "Karagga's Palace", in that order. Karagga's is getting an extension this month that will add more bosses to finish it(it currently goes through Karagga's rancor I think, while the extension will have Karagga himself in a giant robot).
That's it for now, but more will be added in the future. It seems low, but I don't think WoW launched with any either, or at most a similar amount, if that's what you're used to.
And both of them can be done in both 8- and 16-man version. And each raid has 3 difficulty modes: Normal, Hard, and Nightmare. So there's lots of variety for the raiders who want a challenge.