I have always been a loyal member of keywordspy because their keyword intelligence tool beats any keyword research tools out there. Even though the price is steep, it is worth every cent that you are paying for. The extra information that you get from KeywordSpy will put you wayyyyy ahead of your competitors who only does keyword research using Google keyword tool.
Today i received an email from them about their new release of a keywordspy firefox plugin which is going to be FREE! They claim that it will change the way i do my competitor research and indeed!
This plugin is a must have if you are doing ANY sort of affiliate marketing be it SEO or PPC. You need to check them out before this tool goes away (but i doubt so)
Here’s the direct download link..