Joel McNamara says:
Private Idaho 2.8b3, a bug fix version of the popular Windows freeware PGP and remailer utility, is now available. This will be my last official release of PI for the foreseeable future.
Due to other projects and new directions, I haven't been able to spend as much time as I'd like coding and supporting Private Idaho. Instead of seeing it die on the vine, I've decided to release the source code under the GNU General Public License (export disclaimer - the sources do not include, or have ever contained, cryptographic algorithms).
My understanding is that Private Idaho uses PGP internally and provides the same functionality as premail, with an easier to use GUI. Given that, it would still be export controlled, since it enables cryptography. That is why Raph doesn't allow export of premail.