My ideal would be a profile page where these links could be stored, that way it's "opt-in" if I want to learn more about an author. That said, that would require programming time, and it would take me 3-6 months to finish something basic like that because I don't know the code base and don't have a ton of time I want to invest in the project, so I'm not going to push for it. If the choice is between "write this code" and "deal with signatures on comments" then I will happily volunteer and set myself a 3 month deadline. I can live with signatures on posts, though :)