Last year, I theorized that since blogs allowed people other than the site owner to enter hyperlinks (by adding a comment), this fundamentally hosed the concept of PageRank.
Remember that the entire point behind PageRank is that a link from Site A to Site B is a “vote” for the content of Site B by the owner of Site A. But when the owner of Site B can add a link from Site A all by himself, the idea behind PageRank breaks down.
Back then, I wondered:
This begs another question — would Google ever allow you to designate links as self-service? By using a special comment or something, you could declare to the GoogleBot that you didn’t add these links yourself, instead they were added by the link’s target.
Well, according to several sites, this is exactly what Google is going to do. The rumor is that “rel=’nofollow’” on A tags will tell Google not to count that link in its PageRank algorithm. Whether or not this will improve the accuracy of PageRank is debatable.
It probably doesn’t matter, since Slashdot is theorizing that Google is about to take over all the data communications of the world anyway.
Another one via Joseph Scott.