I cannot open another tab to rangefinderforum.com without getting the "Server down" message. But the on the tab I opened at 2:37 I can navigate, search, and post. There are three new messages in the past 30 minutes from a couple of users.
I get a Godaddy.com parking page when I go to RFF by name. When I use the dotted quad froyd posted, I get to the page and can see some articles, but trying to enter the (e.g.) Retina forum sent me back to the Godaddy parking page. The fact that some people see the page correctly and others don't, along with the fact that the direct IP address works, suggests to me that the DNS entries are being updated and it hasn't propagated to all the DNS servers yet. That, in turn, suggests that somebody has changed hosting providers or at least domain name registrars. But I'm not a 'Net expert, don't take that as gospel.