Submitting a site is easy; creating a site that gets included is not. We go for quality over quantity, that's the main parameter. We don't care too much if the site is already on another gallery, or even if it's been around for a while.
To submit a site fill out the form on the right, we'll take care of the rest. You won't hear back from us though, either it will get posted or it won't. If it isn't posted don't take it personally, it just wasn't good enough!