toolbarqueries.google.com

[Jesse_Smith]

How do you find the ch # for your site to see the page rank?

Here's an example, toolbarqueries.google.com [toolbarqueries.google.com].

[Brett_Tabke]

You can't...

[WebWalla]

Actually I think you can. Visit the site in question first, then take a look in Temporary Internet Files and get the value from a string that starts ...
search?client=navclient ....

If you replace the &features=Rank parameter with the following it also gives you the Google directory category ...
&features=Rank:FVN

If you omit the &features=Rank parameter altogether you get an XML feed, which I believe was used with earlier versions of the Toolbar.