I'd like to be able to change my Less Wrong username. It wouldn't have to be free or easy; there could be a request process that an admin has to manually approve, a karma reset, even a fee. I just don't want to have to lose all the information about what I've upvoted and downvoted (and have to worry whenever I cast a vote about whether I already voted on the same post from another account).

This can be done by request. Please email (preferably from the email address associated with your LW account) me with what you want your username changed to: wesley.moore at trikeapps.com.