This is a MPGuino/OBDuino/Scangauge-related forum.
OBDuino and Scangauge neither does not support OBDI, only OBDII.
MPGuino supports everything as long as you can get electrical pulses from fuel injection.
There is no up-to-date sites regarding MPGuino or OBDuino. Best you can get is to read the stickies on this forum category and few posts, and the wikies:
MPGuino - EcoModder
OBDuino32K - opengauge - Homepage of the OBDuino32K Project - Open Source Fuel Efficiency Instrumentation - Google Project Hosting
Here i know atleast three MPGuino sellers, JellyBeanDriver, Meelis, and me.