We need to get Bill to bring that chip to my buddy to see if he can flash it, then we can get him hooked up with a tune...
I love having the nice, quick, firm shifts... Makes having an ATX not all THAT bad...
EDIT: Oh yea, on my late 99 (build date 9/99), we had to solder the J3 port... Without it soldered and the chip in if you tried to turn the car on the speedo would just get pegged at 130mph...
On earlier cars you should be good to go though...