I've just discovered how to test where Google Adwords is showing your ads. This is useful because if you are using personal search on Google it's skew the positioning based on your previous searches and click through. Meaning that it'll show the position it thinks suits you best not what the vast majority of users will see. Which is a great idea on a personal level but terrible when you're paying for the ads yourself.
Anyway to check the positions using Google UK do your normal keyword search and then add
=&adtest=on to the end of the URL.
You'll then get a page with a warning saying this is a test site as well as a background telling you the searches are just previews.
For the US add &gl=us.
To some people this must be old news. It's new to me at least.