We all know that mac developers have always been left high and dry when it comes to having to live without the Google toolbar, and therefore without the convenience of a PR bar while web browsing.
However, I stumbled upon this tool: http://www.digitalpoint.com/tools/pagerank-mac/
I'm a windows and mac user and I've yet to try it yet, but it does look quite promising. Don't ya think? I know a lot of mac people who have been begging for something like this.