Blizzard BC Attunement Guide

[Plankeye]

Thought this was an interesting site. Hovering your mouse over an instance like Karazhan will show you what is required.

http://www.wow-europe.com/en/info/basics/bcattunement/

 

[Avesther]

If you click on the instance, it will keep the path (if one exists) shown so you can navigate around the page if you have a sucky small monitor like I do. This is a great find.