Home Page Redirect

While my WPMU site is being built I want to be able to use a static html squeeze page to build the launch notification list and show videos of what is to come inside.

What is the best way to accomplish this. Wordpress' index.php page continually comes up when I have the 2 there. I can't fully grasp the best way to do a temporary redirect until my site is ready.

Anyone?

Thanks.

Mike