@Jon - when I was at word camp someone asked that and the answer right now is no AFAIK

I also like to use htpasswd to 2x password protect my admin panel.

Also, while I 100% agree you shouldn't use the admin account it sucks that any use of author archives or author feeds use the username and not some different slug. So if you do use a different name and delete admin it is not hard to apply a dictionary attack from scraping the username from an rss feed.