Here's an interesting article on the effect of changing a few links around....

http://weblogs.hitwise.com/bill-tancer/2006/08/google_video_what_a_difference.html

Interesting. I asked them for similar stats for Froogle, which was removed from the homepage (unless you open the "more" box, that is)...

I mentioned that here http://blogoscoped.com/forum/61848.html