1. A computer device including an electronic calendar having a number of calendar features comprising: a configurable calendar input surface that uses a number of input types and view types to present personalized calendar features; and an appointment component configured to use a personal note taking space associated with a calendar item to retain personal note information independent of an organizer or other context such that the information used in personal preparation for and during an appointment can be tracked and saved, wherein sharing of personal note information can be determined using sharing rules.