It's a Blog. Not a message board. A blog.

You're not supposed to be changing your nickname every day. It's allowed to be changed in case you actually change your name to something else, but in general you're supposed to leave it alone after signing up.

I think after you change it you have to repost or republish or something before the change goes into effect . It's not meant to be changed on a whim, though, so constantly changing it will probably fuck things up. One of the reasons why I'd rather everyone just left it as their plain first name. (aside from how I might eventually reference it in the HTML, and changing it from what I've referenced to would fuck the code up)