On the heels of last week's passing of Harvey Korman comes even more bad news for Chicago entertainment legends. First, Paul Sills, Second City co-creator and director of other troupes such as Playwrights and Compass Players, passed away yesterday at the age of 80. As a student at the University of Chicago, Sills joined forces with Ed Asner, Elaine May, and Mike Nichols to found the school's first student-lead theater group, "Tonight at 8:30." Later,......