Just discovered how to use of http://www.wordtracker.com for free. They offer a free 7 day trial. Head to http://www.Neteller.com (a paypal like wallet) Open an account there, it's free.They offer virtual mastercard (VCC). Generate a new VCC number every 7 days and use it to give Wordtracker a trial every 7 days. You'll have access to WordTracker for as long as you want. Just don't forget to cancel your subscription before the 7th days. And you can use your real info. And the same info every week. It works. Happy keyword research!