just go to any PR checking page to see the current PR. If you would like to guess what PR it might get in the future I can only assure you that any number you get will not be correct. I tried all the tools available before the last update and none of them gave me the correct one. BTW there is no difference if your site is a blog or regular ws
Besides of what pixads mentioned, I would like to recommend Google Toolbar for quick checking of PR. It's a fast way to check, just go to any website, the PR will show unless the website is banned. Sometimes not accurate during PR update though.
I usually keep http://www.mypagerank.net open and locked (Right-click on tab, click on Lock Tab), so that I can use it whenever I want to.
I recommend the google toolbar too, although according to other postings in this forum it is not always the most accurate tool.