Competitive Keyword Advertising: Unethical or a good marketing strategy?

 Over at Ethical Grounds, Michael Kennedy (Vermont's Bar Counsel, and a friend) has a short but insightful post on whether competitive keyword advertising should be considered to be unethical.  In case you don't know, "competitive keyword advertising" refers to the practice of paying search engines so that your ad appears before others when users search for certain keywords.  The topic is interesting and Michael's post is worth reading.  You can do so here.