I have been making an MPGuino and this is a great resource. Thanks to all involved with putting this project together, it is amazing and has been such a fun project for me and I have learned a lot.
Just a couple of comments on the wiki page:
1. I drive a 1999 Toyota Tercel, which is a bit special because the 1997-1999 models have mechanical returnless fuel systems which throw off the numbers slightly. T Vago's script can account for this when setting options during compiling - I was wondering if it would be useful to have a sub-wiki page to list out cars which have this problem with the MPGuino so that people can know right off the bat (Current readily available information just describes it as some Chrysler vehicles).
2. The schematic drawings on the wiki show 50k resistors for the Arduino (first diagram), and 100k resistors for the IDuino (second diagram), for the VSS and Injector lead resistors. I'm assuming they should be the same value? Anyway, I used the 50k ones.