There is a Google Pagerank checker that I discovered while browsing through one of the forums.  The sites name is SmartPageRank.Com.

It shows you pagerank result on 26 Google Datacenters, the validity of your pagerank, and get notified too by email when the PR changes.

The analysis also includes among others the age of domain, traffice rank from Alexa, if it is included in the DMOZ or Yahoo directory, backlinks analysis, and a link code to use on your website if you want to show your page rank on your web page.  This site is particularly useful for those people in the domain aftermarket.

Check it out.