We have been having a play while waiting for WordPress 3.1 to be a full release, one of the things we have been looking at is Google AdSense and how to use this in a theme.
There were a number of questions that a Google search answered, we found a nice heat map from Google and also looked at which size adverts get the most clicks and where to place them.
Three twenty ten child themes have been created and we want to share these, they are only tested on a local environment and have taken into account the new twenty ten theme that will be released in WordPress Version 3.1.