Guest Home Page

Does anybody know how to have a completely different home page for guests and members. Right now the only thing I can figure out is to make some of the html blocks invisible to guests. That way they have to register to see all the blocks and all the features of the site. What I would like to have is a landing page you originally land on when you type in the domain name which shows the custom html block from the basic settings page, and then use the promo flash reloader from the basic settings page for the members home page once they either register or log in. All I see right now is you have to use either the custom html block or the promo flash reloader for both the guest home page and the members home page. I would like to use one for the guest and the other one for the members.