Well, after some research, here is the combo you will need to tune your Subaru (Sorry, not sure about other brands!)
Tactrix/OpenECU/Enginuity combo.
www.enginuity.org for info on the map editing software (free)
www.tactrix.com to purchase the cable you need ($80)
www.openecu.org for the map reading/flashing software called "ECUFlash" (free)
www.osecuroms.org for some starter maps that work very well (most of them are free)
All this info was thanks to nhluhr

Looks like I'm going to go this route to get my ODB-II back
