I just watched an old G.U. trailer from the first ost bonus disc and when they were showing off all the stuff that connects to G.U. this was one of 'em. But I can't find no info on it! Nothing on the wiki and web searches bring up nothing even .hack related. It was prolly just some fancy name for the website back then but it leaves me curious!
The rise & fall of .hack in the west: http://www.neo-prosperity.net/LindzChan/Dothack/Misc/west1.html