Hope this is right place to put this,,,these are some links i found to be useful
Wow wiki is great i use this link all the time to find out info all instances http://www.wowwiki.com/Instances_by_level
Heres a map that has everything
http://mapwow.com/?lng2=65.126953125&lat2=64.20637724320852&zoom=4
If you're tanking then this is a good site
http://www.tanklikeagirl.com/2009/12/22/pre-raid-shopping-list-the-3-3-edition
Wow wiki is great i use this link all the time to find out info all instances http://www.wowwiki.com/Instances_by_level
Heres a map that has everything
http://mapwow.com/?lng2=65.126953125&lat2=64.20637724320852&zoom=4
If you're tanking then this is a good site
http://www.tanklikeagirl.com/2009/12/22/pre-raid-shopping-list-the-3-3-edition