“…Too bad Google Maps doesn’t let you layer more information and filtering capabilities on such a map…”

The problem may not be with Google Maps so much as the time constraints of the devs putting together the view. In any case, this would certainly be possible using Microsoft Virtual Earth maps. A weak approach:
http://www.buckeyetraffic.org/

A better approach, using shapes, lines, and fills to describe boundaries:
http://virtualearth4gov.spaces.live.com/blog/cns!369B39F890CE30C1!306.entry

Remember that you can use your scripting language of choice to write in Javascript arrays and other client-side code as necessary prior to the page being rendered.

Best depending on your needs would be to use Mapcruncher to generate your own tile data. One approach: render your tiles dynamically from data, and graft them onto a map. Many examples:
http://research.microsoft.com/mapcruncher/Gallery/

Having worked with both the Google maps API and Windows Virtual Earth API, I vastly prefer Microsoft’s offering. It’s easier and more consistent in implementation, especially for the harder stuff.

-KF

By Ken Fine (Nee Bogle) on 01.29.08 3:22 pm

How about adding blist to the map? We’re building the first online social database. Our office is at 101 Yesler Suite 502 in Pioneer Square. We launched at DEMO in January and recently closed our first funding round, led by Frazier Technology Ventures and Morgenthaler Ventures.

By Kevin Merritt on 03.15.08 7:09 pm