In some embodiments, a future availability system may include one or more of the following features: (a) a memory having, (i) a future availability program that allows a caller to obtain future availability information about a call recipient if the caller has been designated by the recipient to have access to the future availability data, (ii) program that notifies the caller through a method chosen by the caller when the call recipient's availability changes (b) a processor coupled to the memory that executes the future availability program, (c) an inference engine located on the memory that stores information about the call recipient.