Written by Claus Heinrich at. 03:12:06, 14:32
I stumpled upon this great tool from SEOmoz to measure your Page Strength, a measure made by checking various things like inbound links, popularity, mentions of your page across the www.
The tool gives you a relative importance / visibility of a webpage.
I belive this tools is way better to determine how strong a page is, whereas PageRank only gives you a measure of the inbound links
Aviva directory has made a collection of various paid directories and their link strength. Check them out