Is there any way to find the Google checksum used to determine a PAge rank without the toolbar? All the websites and forums I'm finding on this subject are over a few years old. What is the current status? Can you do it without a sniffer? Is the Google API definitely not helpful?

Can someone help me close this issue? What steps do i take to find the Google Checksum relating PR for this address: http://blog.justinpfister.com (or any other address)?.. Is it possible? Should I continue to research this? I can't find any active forums on the internet regarding this.

I'd like to use this XML output :
http://www.webmasterworld.com/rd.cgi?f=80&d=631&url=http://toolbarqueries.google.com/search?client=navclient-auto&ch=62500954857&ie=UTF-8&oe=UTF-8&q=info:http%3A%2F%2Fwww%2Ewebmasterworld%2Ecom

I suppose you already checked this one?
http://blogoscoped.com/archive/2004_09_16_index.html#109533071478967236

These guys must know how to do it – they got a working PHP-based PageRank checker:
http://www.checkpagerank.com

You can nicely ask them for the algorithm or include their buttons on your page. Or screenscrape them not so nicely – this is the URL:
http://www.checkpagerank.com/jscripts/js_pagerank.php?rand=123&domain=blog.outer-court.com