Also, I looked at your site.
I think that "Driving Directions and Maps" falls short in scope. "Driving Directions and Maps for Your Cell Phone or Mobile Device".
How about looking at the viability of including mobile or cell phone etc... in your key phrases.
This is a niche market and should be included in your
SEO data.
You are at 23 in Google for Mobile Maps. Similar for Cell Phone Maps. Not bad, you might want to focus on the niche market.