If you miss SearchStatus or SEO for firefox, the extensions that allowed you to check the Page Rank of a certain page with ease without leaving the current window, you'll love this solution for Google Chrome!
Just make a new bookmark, name it PageRank (or whatever, it doesn't matter), and fill it in with this javascript:
javascript:void(window.open("http://pagerank.passiveprogress.com/index.php?url="+escape(location.href),"Check Page Rank","height=100,width=400,top=0,left=0,location=0"))
Now, whenever you click your PageRank button, it will pop up a little dialog window with the Page Rank of the current page you are viewing.
Cheers!