Is there a nice GnuPG/PGP front-end for Ubuntu? There used to be a package called something like seahorse-plugin, that let you right-click on files to encrypt them. I don't see it anymore in the software repository though. Is there something else?
If you're encrypting using keys, pyrite is not as quick to use for files as the slick nautilus plugins, but you can check it out anyway.
PS: I'm the developer. Pyrite's a fully-functional gtk frontend for gpg/gpg2; just needs some nice icons/graphics and to be packaged up proper-like.