A scenario occurred recently with a theme that I have been developing where it needed to have each post section, each div, to be given the classname of the author …
Sign up for a free account, this lets you add comments to the posts, log into the forums, download themes (although you can do this without an account), and download special additions for members only.
Not that the default wordpress login page is bad, but a lot of clients want it altered to suit their needs. Maybe a nice logo, or a font or colour …
Onyx WordPress Theme