Make a website standard "coming soon" page, page with signup functionality.
The functionality should be similar to [url removed, login to view] - ie. when you sign up, it will create a link where you should have 1-3 people sign up via before you get access to the beta-version.
This should be made as simple as possible, with no CMS, just a php-include for various settings. The design would be very simple, and very much similar to memit.com. I will supply as soon as I have selected a developer.
I would like to use it for various sites, so it should be very simple to install and maintain.
I have separate service that will send out emails to people signing up, so it only needs to call this service as an URL.