...more recent posts
Comment spam hasn't really been a problem for us here. Yet. But it is clearly just a matter of time. Sixapart, makers of the hugely popular Movable Type weblog software, are taking a shot at a solution: Typekey. Worth keeping an eye on. Details are a little thin, but it looks like a centralized identity infrastructure run by them, but open to all (with, it appears, some fees if you are including the technology in a non free product.)