Does anyone know where I could find shortest splitline maps for the immediate aftermath of the 2010 Census?
The person who created the 2000-based maps did them as more a proof of concept, programming exercise.
When San Francisco was asking for citizen input maps for its supervisor districts there was some discussion about creating a map, but I don't think they ever actually created a usable map (the algorithm excludes zero-population blocks, but San Francisco wanted all blocks).
I know there was discussion about creating an open source tool kit, but I don't know whether that actually went anywhere.
So I think the short answer is they don't exist; but the long answer is that they might come into existence if there was enough interest or someone was willing to help (for example the necessary data has to be extracted from the Census Data. I was able to extract the SF data using a spreadsheet, so it is no means an impossible programming effort, but perhaps not one to repeat manually 50 times).
I'd try one of the following two discussion groups. The readership is largely overlapping, so I'd probably try one and stick to it, unless there was zero response.
http://groups.yahoo.com/group/RangeVoting/Yahoo group - Range voting
The 2000 maps are in the file section of this group, and the implementation was created based on the discussion in that group.
http://groups.google.com/group/electionscience?pli=1Google group - Center for Election Science
