The Fusion Brain doesn't look bad, and price is pretty good -- about the same as an ELM based adapter for OBDII (maybe a bit more, but close!). The software and sensor areas are still a bit fuzzy. I'm assuming it wouldn't be too hard to use standard automotive sensors as long as the range is known since they are primarily potentiometers. I clicked on the "skins" tab and was directed back to the main page though. Do you have a skin for MDX that looks like a digital dash board? I'd want a speedo and tach as well. Both of those are voltage pulses.
A tutorial showing how to connect even a few simple gauges (say the basic volts/oil pressure/water temp combo) would be a great demo and selling point! Add a tach and/or speedo and any common instrument can be duplicated by modifying one of the above.