Please review "Pivotal Tracker for SEO" - SEOaholic.com
sbc: Looks like a useful tool, but seems overpriced in comparison to the competition, so perhaps you could look at the pricing structures.One obvious competitor is caphyon.com who do Advanced Link Manager and Advanced Web Ranking which have vastly more functionality for a similar price to your Bronze license, and no limits on sites and keywords. They run as desktop apps which can be seen either as a disadvantage but probably an advantage (in that a user doesn't have to trust someone with valuable commercial information on profitable keywords and so on ).