Hey Shaun-
My experience with AdWords is that I get some traffic from them - and when I compare my AdWords $ expense to my AdSense $ profit, I come out ahead.

But (here I go again tooting for SBI!!) because of the organic traffic I get from Google and the other search engines, I keep my AdWords campaign to a bare minimum - enough to use the research tools (the keyword research tool is a nice backup to the SBI tools).

__________________
Amy
-----------------------
Real life marketing solutions for your small business!
SiteSOHO.com