Page Rank Update
According to Matt Cutts, Google has already started to update its datacenters and the new toolbar PageRank values should become visible over the next couple of days so expect hundreds of endless threads on all the major forums with people having virtual orgasms everytime their PR goes up and probably suicide attempts if the tiny green bar gets smaller.
This proves once again how what supposed to be a fair and useful website quality measurement tool became one of the most manipulative tools in the internet history, both by the PR chasers / dealers and Google itself.
Have fun and enjoy your tiny greeny! 
I’m green, i’m rich and i’m loving it
)
Hehe…keep up the good work then
The reason why PR is manipulated so often is because this is the only real metric that Google has disclosed as being a real part of its search engine algorithm. Why Google has also disclosed that PR is not the only manner that it evaluates a website, it is the only value that has a corresponding number (N/A, 0 – 10).
If Google were to offer a numerical value for the construction of tags, tags, and the like, then we would see more sites offering to manipulate these essential parts of a web page. As of right now, Google may let people know that a problem has been found through it’s webmaster interface, however, notice that there is no numerical value assigned to such problems.