This handy little tool goes through all your backlinks and determines the anchor text.
unfortunatly it uses the google link command so it only displays a limited sample of backlinks
but its still enough to give you an idea of what your most popular anchor text terms are.
http://www.webconfs.com/anchor-text-analysis.phpAnother interesting one is
http://www.webuildpages.com/neat-o/It picks up a lot more backlinks but sometimes tends to time out before it has all the links done.
its still fairly effective, and finds a lot more links than the top one, this could be one to keep an eye on.