Region residents planning to sign up for this year's Chicago Marathon will have to wait a couple of weeks. Registration was supposed to open today (Wednesday 3/5), but that's been postponed until noon Central Time March 19th. A notice posted at the event's website says the delay is "to finalize a routine yet comprehensive assessment" of their new registration process. It's the second year in a row a website issue has affected registration. Organizers say the April 7th guaranteed entry and lottery entry deadline remains unchanged.