Bah, just tried building Pine on my home box(sick day, woohoo!). Either it didn't build properly or I'm blind, since I can seem to find the executables anywhere. Sigh.
I've also decided to code up a quick'n'dirty program to add a custom sig depending on who is getting each email. Should be interesting. First attempt will be in C, then maybe I'll move it to something else(Perl?)