Contract signing is definitely program dependent. I think the majority of the PGY2 contracts for those who matched this year will be sent to you next spring in '08. However, there are some who will send you your Radiology contract for next year this spring in '07, about 16 months prior to starting. I really just depends on the program.
Don't worry about contacting them for the contract. As long as your address is correct, they will send it to you. If you haven't heard anything by next year at this time, you might want to call them.
