I've already received an e-mail directing me to an intern welcome website and the PD contacted me by telephone as well. You will probably receive some sort of contact, either by e-mail or over snail mail, soon. My e-mail said that they would be mailing us the contracts to sign pretty soon too. If you get impatient, I guess that you could just e-mail them to see what's going on. One of the chief's should be able to direct you to the info that you need (housing, start time, etc). Congrats on matching!