Dave
In my humble opinion...
I would remove the Adsense, as it can distract from your sales message on the home page. You can lose valuable visitor count this way.
Unless that is one of your
main objectives with this site (earning Adsense income).
Now, back to the sales message. Put more emphasis on a headline and a touch of sales copy (200 - 400 words should do it).
The headline should "catch the attention" of those visiting your site. Color choice is important, as well as the words you use to gain attention.
The body copy (sales copy) below the headline needs to reinforce the
benefits of your map site vs. all the others.
Notice the word benefits...do not use features here...
In other words, how do I as a visitor benefit from your product and visiting your site? What does it offer me? How does what it offers me give me a reason to buy again, and again, and again...and refer others to your site (word of mouth marketing is something most online marketers miss).
Hope that gives you some tips.
Check out my offer in the SSWT Special Offers section of this forum if you would like to consider enlisting a copywriter for your site.
Or, you can visit me on the web at
http://www.dynamicwebcopy.com if you would like.