pb implemented PGP/GPG signing into his commenting system. I had mentioned doing this before, somewhere, on somebody’s site, not that I can remember where, but I think it’s a good idea. Perhaps at some point in the future when using public key encryption is easy enough for Mom do to, this will catch on.
As it is though, his system is well done, and not at all intrusive to people who don’t know squat about digital signatures. Does anyone besides me want to see a <link rel="publickey"…> tag?