Google Thematic Map Tiles

Google Maps Api has made creating point-based maps easy. Almost anyone with some rudimentary knowledge of html and Javascript can plug in some addresses and get a fairly dynamic map. And it is entirely fun to be able to mix in images, videos., etc.

 However, making a thematic map is still far from easy. The first challenge is to create the reservoir of tiles (256 x 256 pixles) at different zoom levels and feed Google Map API tiles with appropriated x, y coordinates and zoom level. Seems that a lot of developers have been wrestling with this. There seemed to have emerged some software to accomplish this:

A. Mapki Tile_Cutter (http://mapki.com/wiki/Tile_Cutter): a c# program that reads a geo-referenced source image and automatically produces a set of 256x256 tiles ready for use in a custom map layer or overlay

B. MapCruncher created by Microsoft Virtual Earth

As stated by Virtual Earth:

"Just find 5 to 10 corresponding landmarks on your map and on Virtual Earth, and MapCruncher will register your map to the global coordinate system, warp it to fit a Mercator projection, and generate a set of image tiles that can be seamlessly mashed up with VE's standard road or aerial imagery. It even makes a sample HTML page to show you how to use your mashed-up map."

C. Arc2earth

"A2E monitors the current map extent and downloads the appropriate tiles to display for that map extent. It also georeferences these tiles so that they appear in ArcMap no matter what Spatial Reference you have set in your map. "

However, none of the above seem to meet the challenge to dynamically create thematic maps with a base set of tiles and a dataset? 

How do you create a set of base tiles of, say US census tracts, and then based different datasets, say population, household income, educational attainment, to create any number of thematic maps?

How?