Ryianne of Stormrage has assembled this freakin' terrific spreadsheet of all the Outlands instances, a must-have close at hand for anyone like me who considers running instances the most fun part of the game. Want to know where the Shadow Labyrinth is, or what level Blood Furnace is, or what rep is given in the Underbog (both regular and Heroic runs)? It's all here.
Ryianne hasn't added one thing a lot of players might want-- exactly how to get attuned to the instances that need attuning. That info has been floating around, though, and it's definitely out there if you need it (my guild is holding a Karazhan attunement drive lately, trying to push our latent 70s to get the key so we can start downing stuff in there). Ryianne also says she's still working on it, so if you have more to add (like the fact that it's Thrallmar rep for Horde in the first three instances), let her know.
But it is cool to see, in a "big picture" sense, all the different options available when someone says "Let's run something." With the expansion, Blizzard has really paid a lot of great service to the 5man instances (not just in size and quantity, but in variety and skill), and nowhere is that more apparent than in a large overview like this.