you probably know the overture keyword tool which is great for finding related kewords, but i came along the google trends, also a great tool to compare different keywords: http://www.google.com/trends?q=sportscar%2C+sport+car%2C+sport+cars&ctab=2&geo=all&date=all see the graph below, some keywords ar good in one country but very poor in other countrys. hope i get some green rep. now!
uh sorry, didnt see it. but i can give you a tutorial how to build a really big joint. how do you beat this?