How Link Weighting can Significantly Increase Your Sites Link Popularity
By Bruce Hearder

New studies are suggesting that search engine are now trating onpage factors with less and less imporatnce, and treating off-page factors such as incoming links with increasing value. The search engines are now more concerned with the number and especially the quality of all incoming links to your site.

Lets use an example. Say you have to 2 sites that link to your site. Both of these incoming sites are a PR8.
The first site, only has 2 outgoing links on it, whilst the other has 200 outgoing links.
The site with only 2 outgoing links on its will carry far more wieight in calculating your site's link popularity than the other site.
This is because PR8 / 2 roughly equates to PR4 for each outgoing link, where the other sites is PR8/200 which equates to almost a PR0 for every outgoing link. In otherwords it does not help your site at all.

So when chasing link partners, look for sites that have only a few outing links and see if they will link to you.
So remember the golden rule, the fewer outgoing links on your link partners sites, the greater the vakue that site will have in promoting your site.