Maps for statewide primary elections are now available in the MAPS section. A direct link can be found here.

You can find performance maps for every Democratic and Republican primary candidate for statewide office going back to at least 2002 and many races from 1994-2000 are also available. You can see maps by county, by Cook County township and/or by Chicago ward.

I'm pretty happy with this development as now this website can display all of the statewide maps I've had in my files and had hoped to include.