more and more people are going microtech or even autronic
autronic is actually a self learning ecu - just like the current ford ecu's (from what ive heard, pick, say 5 points, set the AFR's at those points, upload it onto the ecu, start the car, run the car up to limiter and ecu sets a perfectly straight AFR line)
http://www.tfelectronics.com.au/PageFiles/pluginECU.html