Im heading there this year and its my first comic con. Im not sure what to expect. I know that its obviously going to be smaller than San Diego but will it host much the same stuff, props and such?
If you're expecting ANYTHING like SanDiago, you're in for a HUGE disappointment.
The Chicago convention is basically a large, small-town con which sometimes hits big with guests (this year is the exception, not the rule).
That's not to say you won't have fun, but don't except big-name booths (last time I went Wizards of the Coast and Dell was there), great panels with your favorite casts, etc. They have some stars, some panels, and some dealers and a LOT of comic artists.