Actually, you don't have to go all the way to Milwaukee. There's a hybrid meeting set up on Dec. 10th in Skokie.
http://www.greenhybrid.com/discuss/s...ad.php?t=10924
As for your specific message, yes, Northern Illinois is cold in the winter. Around here, I'm just starting to see some dips in mileage because of the cold. But cold weather affects the mileage of all cars- living here is NO reason to pick a regular car over a hybrid. It's just that two factors make people think that hybrids aren't such a great idea in cold climates.
1- because hybrids are so phenomenally fuel efficient, more people scrutinize hybrid FE than other cars. If they didn't pay much attention to the winter drops for the regular cars, then it could come as something of a surprise to see FE go down in cold weather when you're paying real attention to it for the first time.
2- Most cars will get a fairly regular percentage drop in FE. A car that gets 20 mpg may drop 10%, say, and a car that gets 50 mpg would also drop 10%. For the 20 mpg car, that drop is 2 mpg- many people wouldn't even notice. But if you're getting 50 mpg to begin with and it drops 5 mpg, you'll notice it.
Conclusion: Buy the hybrid. Cold weather or no, 50 is better than 20 and 45 is better than 18. Lower FE cars actually take a much bigger hit in the total amount of extra gas they have to use in the winter, relative to hybrids, so if you're looking at it from an environmental perspective or from a cost-at-the-pump perspective, hybrids save a lot.