Magnetic ------

Mark Pilgrim received a cease and desist letter for his word rearranging web application. It's neat, but unfortunately the comapny is correct. They were already offering their online version of their product before Mark built his, and they have trademarked the term. So Mark's service is definitely confusing. He uses a trademarked term to refer to a substantially similar product.

So in this case the company is just protecting its interests. Mark links to a list of similar pages, and several do use the same term. I don't see how that justifies Marks misuse of a trademark though. The company does not (at least in the letter Mark posted) say that he is not allowed to provide the service, just not use their trademark to describe it.