There is a satellite communications system for email called the Mini-C which is reasonably economical. The coverage is world wide, the equipment (satellite transceiver) only costs around $2000 USD, and you pay by the message/length. It is more expensive to use than Sailmail or Winlink for email, but coverage is global. They also claim an automated weather service, but that doesn't seem to be working yet.
The equipment is made by Sailor. A link to a sales brochure:
I have some friends who used it and seemed happy with it.