15. A computing system comprising: at least one processor; at least one memory architecture coupled with the at least one processor; a first software module executed on the at least one processor and the at least one memory architecture, wherein the first software module is configured to generate a calendar event that is addressed to a plurality of calendar event recipients, said calendar event being an event scheduled to occur at a future time for a plurality of participants that is recorded in an electronic calendar in a calendaring application, said calendar event recipients receiving an electronic notification of said calendar event via a computer network; a second software module executed on the at least one processor and the at least one memory architecture, wherein the second software module is configured to generate a designation of a subset of the plurality of calendar event recipients as first annotation recipients such that, with respect to the specific calendar event, there are both general event recipients and first annotation recipients; and a third software module executed on the at least one processor and the at least one memory architecture, wherein the third software module is configured to associate a first annotation with the calendar event, the first annotation comprising information additional to the calendar event as originally created and being addressed to the first annotation recipients, the first annotation addressed to the first annotation recipients such that, with respect to the specific calendar event, all recipients are sent the electronic notification, but the first annotation is sent only to the designated subset of recipients for that calendar event.
15. A computing system comprising: at least one processor; at least one memory architecture coupled with the at least one processor; a first software module executed on the at least one processor and the at least one memory architecture, wherein the first software module is configured to generate a calendar event that is addressed to a plurality of calendar event recipients, said calendar event being an event scheduled to occur at a future time for a plurality of participants that is recorded in an electronic calendar in a calendaring application, said calendar event recipients receiving an electronic notification of said calendar event via a computer network; a second software module executed on the at least one processor and the at least one memory architecture, wherein the second software module is configured to generate a designation of a subset of the plurality of calendar event recipients as first annotation recipients such that, with respect to the specific calendar event, there are both general event recipients and first annotation recipients; and a third software module executed on the at least one processor and the at least one memory architecture, wherein the third software module is configured to associate a first annotation with the calendar event, the first annotation comprising information additional to the calendar event as originally created and being addressed to the first annotation recipients, the first annotation addressed to the first annotation recipients such that, with respect to the specific calendar event, all recipients are sent the electronic notification, but the first annotation is sent only to the designated subset of recipients for that calendar event. 20. The computing system of claim 15 , further comprising: a fifth software module executed on the at least one processor and the at least one memory architecture, wherein the fifth software module is configured to generate a designation of a second subset of the plurality of calendar event recipients as second annotation recipients; and a sixth software module executed on the at least one processor and the at least one memory architecture, wherein the sixth software module is configured to associate a second annotation with the calendar event, the second annotation addressed to the second annotation recipients.