I never did like SEO since I know that it is stupid to game search engines for the sake of improving page rankings and traffic. It is stupid since nobody really knows how those search algorithms really work but yet some idiots (internet marketers most of them) claim that they can do fantastic things with SEO. Yeah right!
Anyway, if you are one those people who loves to do a little bit of SEO, check out SEO Keyword Ranking. It is a brand new site that provides keyword-tracking services for desperados; try their free service and see if it could really help you with SEO. Good luck!