I found these Google Earth (.kml) files for the most gerrymandered districts in the US. The geographic data is correct. The office holders reflect the 109th Congress, but considering how gerrymandering helps keep incumbents incumbents, there are not that many changes. There is a .txt file that explains how the author created the files.
To see the files you must have Google Earth, then down load the zip, extract them to a folder, and double click.