Hello mates, I have seen many discussions about page rank that it has been eliminated by Google, suspended by Google and bla bla bla. Yes, there has been problem in PR with 3rd party tools/toolbars (seo quake, seobook,etc) or websites (PR checker, etc) . These are all showing N/A when you look for PR. i experienced the same problem in the morning, but it was not a problem anymore when I tried Google's official toolbar. It was normal as it was. I didn't notice any change in PR as well. Go to toolbar.google.com and install the official toolbar for your browser to check Page rank.. Now, chill and have fun..
Yes, Last Google page rank has been updated in July. In general Google takes 3 to 4 months to updates. So we have to wait for next 2 months for next update.