This website isn't widely known about so try keep it low key or it may get killed off.
Basicly you submit your website with just www. no http:// and it will then post of the stats site which gives you a free backlink, this is also great if you have a new site which is not yet indexed by google.
This will generate a few thousand backlinks just keep the window running till it finishes, if you have another website open a new window and have both running
Spoiler:
Social Networking Bookmarks