Strategies for offline PGP key storage

Hi, I am the creator of Signet. I just wanted to say that I am very interested in adding more cryptographic functions to the device. It's internal database is flexible enough that PGP key storage could be done as an add-on. There is a bit of a balancing act in terms of the space needed to store GPG keys and algorithms as well as the data and algorithms for password management but I think there is room for it all. This is something I will probably develop once I've completed all the features I've already promised. I wasn't aware of Gnuk before. I may incorporate it directly or consider making a compatible interface.