Civil unions became legal today in Illinois, with the first ceremonies scheduled for tomorrow. The Cook County Clerk's office has a FAQ on Civil Unions for anyone interested in the procedure:
Illinois will begin offering Civil Union licenses at county clerk offices on Wednesday, June 1. The Cook County Clerk’s office will open its downtown office early to mark the momentous occasion. “I’m thrilled this day has finally come,” Clerk David Orr said. “This will be a joyous day for all couples – gay and straight – who want to make history as part of the inaugural group of civil unions.”
Illinois is now the 10th state-level jurisdiction, including the District of Columbia, to allow gay marriage or same-sex civil unions.