So I finally set up the Cobalt Qube 2 at home - the web and email servers are now running there instead of on my workstation. Crap, sendmail is a pain in the ass. The Qube 2 actually has packages for MySQL, PHP, (old) Java, etc., which is super cool. I'm slowly updating it though - I guess the original distro was based around an old Red Hat version on a 2.0 kernel . . . thank god for GNU.
Enigmail, a nice PGP plugin for mozilla, works nicely if not perfectly. The problem (as ever) is key management. Grrr.