Google Design Usability
One of the main differences between Google and Yahoo has always been the simplicity of the main page.
While Yahoo's main page has always been crammed with content, Google kept it simple, but even its simplicity could be improved, or so claims Andy Rutledge
Rutledge analyses the current positioning of navigation elements on the main page and offers an alternative design.
It makes for interesting reading.

While SEO seems to be a black art, with moving goalposts, the real question remains
"Does showing Adsense with google and the equivalent top 5, actually increase your rankings?"
Let the debate begin!