@previous (B)
If there isn't one yet, an anonymous, 1-click-to-register openID provider would be very useful.
@previous (A)
It's open source, so redesigning it shouldn't be too hard if there isn't an internal option for it already. All in all, it actually looks pretty good on a modern browser!
Using Postgres - Cool
Heavy use of JavaScript and Ruby on Rails - Kinda freaky :P