@radog
I got out of adwords after google got so strict about landing pages and cpcs skyrocketed but it might indeed be a good time to get in again to find good terms. BUT, there are some things you can't measure that way and this is my point. I already talked about finding out which broader topics are juicy. You might be able to do somethin g similiar by bidding on broad or phrase match terms...but that wouldn't tell you how easy it would be to rank for them. Let's say i throw up a new site with 50 posts ..ah well, scratch that, you could combine the adwords data with a competition check. Things are just getting more uncomfortable and expensive.