Here's the direct link:
http://www.DigitalPoint/tools/suggestion/
It's the best one there is, gives you both Overture and Wordtracker stats..
By the way, Digitalpoint is in need of new servers, looks like we are using the free tools way too much right now.
Here's a donations page if you want to help out keeping the great tools free..
http://www.DigitalPoint/tools/donate.html
A great free resource and tool for overture count is http://www.startname.com/linkpop/ by our very own checknme here at NamePros. :tu: (No Affiliation)