I got mine done through KRC Performance. It's listed as a Performance Cam Cal for $449 on their site. They send the 3.7 ECU to B&G Chrysler. That's how I found out about B&G. Mine runs more powerfully on 89 than the stock ECU does. It actually benefits from running on 93, unlike the stock ECU that isn't programmed for anything over 89. When mine was on the giggle juice, it made 252 rwhp and 301 ftlb's torque on a Superflow in 90 degree weather with 93 octane. That converts to about 270 rwhp and 325 ftlb's torque on a Dynojet. Even with just converting the low numbers, 315 hp and 375 ftlb's torque at the engine is not bad at all for the 3.7. The numbers converted to Dynojet would be around 335 hp and 400 ftlb's of torque at the motor. The most it made before the gears, converter, and ECU was 214 rwhp and 251 ftlb's torque.
http://www.krcperformance.com/newcontent/pcm.html