Just saw this over on Zpost. It appears that the turnout should be pretty nice with a good amount of BMW, MB, and Audi. It's a Cars and Coffee type of meet put on by:
http://www.gasolineandcaffine.net/Home_Page.html
Sunday, April 1st 2012
UPDATED Location:
Caribou Coffee 2879 W. 95th Street Naperville
NE corner of Rt. 59 & 95th St.
Time: 9:00am-11:00am