WoW Insider posted a copy of a great forum post from the EU WoW Forums that was a guide to the Heroic instances. There are ratings even for each instance and quick a bit of good information and helpful hints.
You can find the WoW Insider article here.
What do you guys consider the easiest Heroic? Hardest? Which have you been in? (Yah, I know which you have been in, Kezz and Bligh…) Do you think the Heroics are a good method of rreinvigorating stale instances or just a cop-out to keep Blizzard from having to design more lvl 70+ 5 man instances?