As tptacek commented on an earlier post, all of the alternatives to PGP provide more or less the same UX that PGP is capable of. It's not inconceivable that my PGP client could do most of the legwork (ie, fetching keys from keyservers, encrypting automatically, etc.) for me while maintaining compatibility with PGP.
In any case, I don't really want to enter a PGP vs. OTR discussion right now, because my original point is that many self-identified hackers use neither. If people read this thread and begin to use either one or the other, I consider that to be a win for now!