Robin Garr wrote: It goes back to segregation and public schools that were historically separated by blacks and whites.
That's a great synopsis.
Here's a [i]Louisville Magazine[i] article that does a good job matching the old case with the new case. It was printed just before the Supreme Court ruled on the latest case which brought the housing income issue into play. There's also a timeline at the bottom of the article.
http://www.loumag.com/articledisplay.aspx?id=23141292
I remember doing a big paper in college on busing, specifically relevant to Louisville. This was before the latest Supreme Court decision. I'm really interested in the topic/debate, but not having kids, I don't think I truly understand the day-to-day consequences of busing. That being said, the root of the problem is segregated housing. Not sure how we are going to integrate school populations when we live in segregated neighborhoods.
For evidence, take a look at this map:
http://www.flickr.com/photos/walkingsf/5011003858/in/set-72157624812674967/