To ensure your theme shows an easy login and register:
Edit your theme's header.php file to include the register and login/logout
Note: The register link is only displayed if 'anyone can register' under the options section of the admin area is enabled.
(see the source of the page)
<body>
<div id="rap">
<div id="header">
<ul id="topnav">
<li><a href="http://blogs.sitename.com/">blogs.sitename.com</a> | </li>
<li><?php wp_register(' ' , ' '); ?> | </li>
<li><?php wp_loginout(); ?> | </li>