I think this suggests that we should let the BlackBoxVoting.org people follow up on this, but as a community Kossians need to move on to why liberalism itself is so weak right now.
Higher numbers indicate that the candidate overperformed relative to his registration numbers. Kerry did best in some of the e-vote counties. Without very solid exit poll data this avenue of spatially matching evote counties with results can go no further.
ES&S Touchscreen Update: Here is a picture of the Diebold Machine distribution with bush vote percentage - republican registration percentage highlighted. Here there are a few outliers, but they do not really suggest voting machine problems. Also, see the plot in comments below for a comparison of machine, voter deviation and county population. It further suggests that the machines perform similarly, or at least not detectably differently. Diebold GEMS Optical Scan