If you use a Macintosh computer, here are a few useful links for software if you would like to use encryption on your computer. Grab my public key from this server or the mit server and send me an email to try it out.

Sente GPG Mail plugin for Apple Mail.
http://www.sente.ch/software/GPGMail/English.lproj/GPGMail.html

MacGPG (needed for using the GPG Mail plugin)
http://macgpg.sourceforge.net/