I am playing around with Google AdWords currently. Google surely makes great tools, and Google AdWords is no exception – simple, flexible, documented, with plenty of statistics and reports, as well as a number of wizards… And it integrates nicely with Google Analytics too.
P.S.: If you will see any of my projects in Google ads, please don’t click – I’ll be charged for every click and you will be redirected to the web site that you already know about.