Easiest way to create a dynamic heatmap of the United States

Question

Hello All, thanks for all the help the last few days. I'm hoping someone knows this one.

I'm looking to dynamically create a heatmap of data based on user input, then color certain states based on the response. Like a poll for voting, for example. I'd like to do something like this... http://www.trulia.com/home_prices/

What is going to be the easiest way to do this?

Answer 1

OpenLayers is a javascript library for displaying tiled maps and related elements (polygon, line, etc) on top of these tiles.

It supports a number of back-ends for map data, including google's data.

Samples are available here