I was doing some searching for a new keywordtool that did not rely and overture like keyword analyzer and i fund
Matt's Free Keyword Tool
This tool works (as far as i understand it) on the free wordtracker database, witch is better then overture i think.
But the best part is that this tool also shows you the competition in the 3 major SE and even more you also can watch 10 video's about keyword research and he is also doing a casestudy on how he research his keywords, i fund it great to look at and even i learned a thing or two
The best part is that it is all free he only ask for a email, and before you ask no it is not my site i am not affiliated with in in anyway i don't even know the guy, bur i thought it would be a great find for a lot of you
Have fun.