Your comments

This would be the best feature for large environments, it would help find coverage holes from live data.
I think this is what I'm looking for, I have building floor plans that I'm using and would like to use those exclusively, I don't much care about google maps, but it should be left as a feature for those that use it.  What's that called war driving?
I would suggest allowing the free version to only display 1 access points heatmap, then when you pay have it display all access points at the same time.