I'm in Milwaukee for every autocross that is held at Miller Park. Normally I drive my 200SX in the street mod. class, and sometimes I run the S2000. Regardless you should stop buy and check out the scene. Usually a few Nissan's.
i guess i will finally reply to this thread. I live in Milwaukee too. Actually in West Allis. 4 blocks west of hwy 100 "Ricer central"
What color is your car. I am friends with John the guy with the Audi blue 240 with the s15 motor in it. I have a red 200sx SeR with a couple bolt-ons.... see here http://www.nissanforums.com/showthread.php?s=&threadid=5661