If you need another beta tester My MX-5 NC install will be done early next week:
Custom fascia
700IDT
Mac mini 1.66 duo
p1900
Gonna be adding a GPS unit, OBDII (hopefully with mazda specific code DB) and radio/DTV tuners to it soon...
I also have a spare griffon powermate
I was going to buy centrafuse/streetdeck, but both have limited functionality in terms of GPS in oz, and road runner just isn't pretty enough!
I must say your interface is the cleanest I've seen.