Again, I'm by no means trying to suggest that OTPs be considered for particularly wide application. Rather, that OTPs and a range of other systems be designed, implemented, and made available so that potential users can make their own informed choices.
One time pad systems are expensive enough and in uncommon enough use that I doubt they are going to get written as free software. I personally am not going to work on them, because I don't want to go buy the necessary hardware to generate and hold sufficient key material for a practical application. You also need hardware random number generators for a secure OTP system. Such boxes are not readily available, or come cheap. While not obvious, making random bits is a very deep problem. See Knuth volume 2 for some insights. I suspect that this same argument holds for all the rest of the people in the group as well. I don't know of anybody who wants to implement this system for themselves, given the cost involved. Cryptography is all economics, and the economics here are that one time pad systems are expensive enough that the software that gets written for them will be for in-house use or will be commercial. In either case, someone is paying someone else for developing the software. It might be possible that there are enough people who do want this that there is some money for development. A perfectly possible outcome is the creation of a consortium to hire some implementers who would make some gnu-ware. Such organization does not exist. Until it does, an off-the-shelf OTP system won't exist. Eric