http://www.winlink.org/
For those who want to have e mail contact through HAM or SSB Radio. This site explains the principals of using the Pactor Modem together with HF Radio to set up an e mail system either on the free HAM frequencies or the paid subscription Sailmail program.
http://www.mmsn.org
A dedicated group of HAM enthusiasts that maintain a radio net for cruisers on 14.300 daily.Weather info, chat, emergency and contact.