Our host Rackspace is currently facing an issue with their DNS resolution. This means our services and site are still fully functional but a small percentage of people in the world can't actually access our website.
If you absolutely must access our site immediately add the following two entries to your hosts file. It is very important to remove these entries as soon as possible since our IP address can change at any time without notice.
Instructions on how to do this will be different depending on your OS but this help http://www.howtogeek.com/howto/27350/beginner-geek-how-to-edit-your-hosts-file/ .