Interesting insight into the workings of the googlebot by SEO expert Alan Webb in a new Search Engine Journal article. It appears singular domain name links to a website now affect PageRank to a high degree.
"......Google now counts multiple links from a single domain as just one link when it comes to PageRank and for the ranking algorithm. Hence a sitewide link is no better than a single link on a homepage.
Therefore it is not the number of inbound links that are important, but the number of different domains that link to you.
It is very important to remember that. Especially if you are using Google for your backward link checking. I am fairly confident I can pronounce:
“Link Popularity” is dead, long live “Domain Popularity"!"
source : Search Engine Journal
And what about Yahoo? It seems descriptive URLs are put front and center as one of the fundamentals for sites getting "Slurped" to higher rankings by the infamous search tool. For more on that click here.