Perhaps the domain I picked is too short, and it looks like an URL shortener (which I agree automatically looks suspicious). I picked something very short at the expense of readability because I figured all the email addresses (like mine,
1BUGzQ7CiHF2FUxHVH2LbUx1oNNN9VnuC1@b1txr.com) would be unreadable anyway, so they'd always be copied or linked rather than read out loud from person to person.
At least the GitHub issue link survived. If you're a Ruby coder you can take a look at the patch, which I thought was pretty interesting.
I hope that the Bitcoin signing feature gets more popular, because it's really useful. So far the feedback I've gotten on the site from my coworkers and friends has been, basically, "neat site, Mike, but I can't figure out how to sign something in my Bitcoin client." It'll be hard for me personally to improve the usability of the Bitcoin client's signing feature, but I hope that use cases like b1txr's become more commonplace, as they'll drive improvements in the client UI.