To communicate with other 'Shavia' (shavian readers/writers) over the Internet, you will first need a Shavian font:
Bear in mind the receiver(s) must have the same font(s) as you for it to work.
An Internet Shavian-using community does exist, so finding people with whom to communicate should not be a problem; but how to communicate with them...?
BY E-MAIL
If your E-Mail program supports HTML-enhanced E-Mail (some programs confusingly call it 'rich text'), you can simply change the font face used in outgoing messages to a Shavian font. HTML-mail is fairly well supported amongst E-Mail programs, but still always check that your recipients' programs can cope with it before sending anything.
BY THE SHAVIAN MAILING LIST
By joining the mailing list, you can keep up to date with anything that goes on in the Shavian world. Go to http://www.yahoogroups.com/group/shavian to sign up and for more information.