angiolo - 2:06 pm on May 30, 2005 (gmt 0)

If the site is listed in yahoo directory I would have a look at the Yahoo site listings "By Popularity".

Since PR is based on links, any site that has a tools for "link popularity check" is useful, specially if you can get a link popularity history/trend report.

I noticed a correlation between Page rank and the link popularity trend.