GonePhishing is a Greasemonkey script that will check links for you. It will check wheter the linked text is actually what it links to.
Once you've installed the Greasemonkey script, you will see the results here. The following link will be normal: http://www.b10m.net/, yet the next link will be highlighted and will have three asterisks appended: http://www.b10m.net/. You can hover over the asterisks to see the originally linked text.
Brett recommended the use of toLowerCase(), which means that the
following link should not result in false positive:
http://SupportMyWedding.com/