Require user to be logged in before seeing anything
 

Does anyone know if there's a way that to configure a store so that a user has to be registered before they can see anything?

Re: Require user to be logged in before seeing anything
 

{if $login ne ""}
Show the site content.
{else}
Show the login box.
{/if}

:-)

Re: Require user to be logged in before seeing anything
 

I would advise against that - if you do it this way even SE will not be able to see the site, only login screen, so no indexing of the site. Leave pages accessible, you can hide prices, add to cart, quantity... just the elements that prevent non-logged in person to purchase but leave the actual pages accessible

Re: Require user to be logged in before seeing anything
 

I wholeheartedly concur. :-)