Those of you having problems loading: you should also post your isp (eg Comcast, AT&T etc). There is a cache in the domain name server (DNS) run by your ISP. If the cache is not updated frequently, such as everyday, it is possible for it to contain faulty information about the active status of the site so that it may report the site is down eventhough it has been back up for a few days (Comcast DNS is notorious for doing this).
How do you know who your ISP is?
The easiest way is to use something like http://speedtest.net/