I have two computers I use on a regular basis, and I don't want to be condemned to having to do the one-time-password dance when I log in to your site from the

I have two computers I use on a regular basis, and I don't want to be condemned to having to do the one-time-password dance when I log in to your site from the second PC. It's true that I'm a geek, but my girlfriend isn't (she's a gamer), yet she also has two computers she uses regularly. And she keeps threatening to get herself an ipad. For that matter, my dad has a PC and an ipad at home (and he's neither geek nor gamer), and I think this sort of authentication system would irritate him into using a different site instead.