It's great to read all this information. Now I know why my site jump around google sometimes at 25 and sometimes 30.
My yahoo pr is always 2, which is good, considering my site is only up for 2 months, and I am such a rookie in web design and seo. I think for Yahoo, contents count-they sometimes have people look it over, and my site has different ranking in different regions--I like yahoo in the aspect. I wonder why google is dominating, google has so many cheating and dead links.
Just my 2 cents.