What does this mean to your web site?The PageRank of a web page shouldn't be the determining factor when optimizing your web site and choosing link partners. A link partner with a low PageRank that has a similar topic like your site will bring you much better visitors than an unrelated link partner with a high page rank.
If you see a good web site with good content that has a low PageRank youshould trade links with that site if that web site is useful for yourvisitors. One day, that page might have a higher PageRank and it will still link back to you.
In addition, the PageRank you see in Google's toolbar is not the PageRank that Google uses for its algorithm. High Google rankings are the result of optimized web page content and good incoming links.