Use the Multi DC PageRank tool to check the PageRank of a specific URL from different Data Centers of Google.
When the PageRank of a specific page is about to change not all Data Centers are automatically updated. By using this tool you will be able to detect such changes before they are visible from the Google Toolbar and understand if your efforts have been recognized and taken into consideration by Google PageRank algorithm.
This tool is very useful to advanced SEO professionals analyzing the behavior of Google PageRank algorithm. It is highly suggested to keep track of the PageRank of all URLs in order to evaluate the general performance along with the results of your Search Engine Optimization strategy efforts.