I may have already posted this, I don't remember.

I came across this little toy about half a year ago, its great fun for political junkies, whether your interest lies in good governance, partisan advantage, or simple curiousity. Its a tool that enables you to create your own electoral districts for the various states, complete with demographic and voting history data at the precint level.

Here's the link: http://gardow.com/davebradlee/redist...launchapp.html