Umm...not sure if you checked the Rogue forums here yet or not but there is a lockpicking FAQ there at the top.
Here's a direct link.
http://wow.allakhazam.com/db/class.html?wclass=4&mid=1103771182256665506&num=32
It's very helpful but somewhat incomplete i think....but it should have what you're looking for.^^ Hope this helps