the_author_email()
Display the email of the author of the current post.
WordPress File wp-includes/deprecated.php
the_author_firstname()
Display the first name of the author of the current post.
the_author_icq()
Display the ICQ number of the author of the current post.
the_author_ID()
Display the ID of the author of the current post.
the_author_lastname()
Display the last name of the author of the current post.
the_author_login()
Display the login name of the author of the current post.
the_author_msn()
Display the MSN address of the author of the current post.
the_author_nickname()
Display the nickname of the author of the current post.
the_author_url()
Display the URL to the home page of the author of the current post.
the_author_yim()
Display the Yahoo! IM name of the author of the current post.