It would be nice if the following security/privacy/anonymity apps were given the 'portableapps.com' treatment;
JackBNymble 2.1.4 Panta-Reliable-Mod-2005-08-17 modified
Reliable 1.0.5 Panta-Reliable-Mod-2005-04-20 modified
PGP 6.5.8 (The CKT version)
Nautilus 1.7 (actually portable since it is a command line MS DOS app. An easy to use GUI would be nice).
Mixminion Type III remailer
Quicksilver email program.