The tournament site is the Westin Chicago North Shore Hotel in Wheeling.
For the top players (and patzers like me who wish to try their luck against them), play begins tomorrow night at 7 p.m. But if one doesn't wish to devote 4½ days to chess, there are also 3½-day (1st round Friiday night), 3-day (Saturday a.m.), and 2-day (Sunday a.m.) schedules.
Details here! Note the garish colors and vintage-1995 HTML layout.
Enter here! The instructions say that you can enter online up to two hours before the first game, but I wouldn't cut it that close.