Joost de Valk informs about Greasemonkey script which allows a person to know the PR of the pages linking to you as well as the anchor test used on the link.
Google Webmaster Tools shows the incoming links for your website, but you might want to know the PR of the pages linking to you and the anchor text used on the link. This Greasemonkey script does just that, by determining PR for the link through an XML HTTP request and adding it in front of the link.
The tool is fast, however one needs Firefox with Greasemonkey installed to check out all the information. For more information read an online book on Greasemonkey.
Aaron from SEObook has a good post on it.