I guess you could create a staticpage that calls the user block.
Text Formatted Code
COM_userMenu( $help='', $title='', $position='' )
I am not sure if it would work 100% or not but the function does return html so it should work.
The not yet released Geeklog 2.1.0 contains some update to the users page which allows visitors to directly access it without a please try again message.
http://www.yoursite.com/users.php
Not sure if this would work for you.
Tom
One of the Geeklog Core Developers.