There are only a small handful of Internet sites that are putting up sharp, clear digital images of genealogical records, the kind of resources that genealogists want to use and will rely on for their research. www.FamilySearchLabs.org has been doing just that. They have just added Cook County (IL) Marriage Records from 1900 to 1920 and announced that they will expand these back further to 1871. Cook County - is more than just Chicago - it includes the townships of Barrington, Berwyn, Bloom, Bremen, Calumet, Cicero, Elk Grove, Evanston, Hanover, Lemont, Leyden, Lyons, Maine, New Trier, Niles, Northfield, Norwood Park, Oak Park, Orland, Palatine, Palos, Proviso, Rich, River Forest, Riverside, Schaumburg, Stickney, Thornton, Wheeling, Worth. I wrote about it with an example at: http://blog.genealogybank.com/2008/12/chicago-marriage-certificates-1871-1920.html