D'Arcy Norman

I needed a way to display login form on the front page of a WPMU network if a person wasn’t already logged in, and a bit of info about the user, a list of their sites, a link to create a new one, and a link to logout. I could have done it by hacking the theme’s templates, but that locks you into a specific theme. With the shortcode, any theme can display this, on any page (or post, but why would you do that? whatever. it’s your site…)

User Info Login Shortcode

This plugin provides a [user_info_login] shortcode to let you embed a User Info or Login section without farting around with page templates or widgets

Jeff Waugh

Login Style lets you restyle your login page with a custom CSS file.
Note: It hasn’t been tested on versions earlier than 2.1, but may very well work.

User Info Login Shortcode vs Login Style