A minor nit, but to satisfy my OCD, could you order the badges on the profile page:
- by badge color, then alphabetically
- by badge count, then alphabetically, or
- by badge color, then count, then alphabetically
Unordered, as is seemingly the default now, isn't particularly helpful.
EDIT: If, in fact, the badges are listed by date last awarded (seems odd that I would have gotten Editor before getting Critic or Teacher before Autobiographer), this information could be retained in the hover over by appending the last date awarded to the badge description, e.g., bronze badge: Earned 100 points answering questions in the blah-blah tag. Last awarded Sep 7, '10 at ...