I did some more looking and it appears that their DNS is messed up. From my home machine I can get a DNS lookup for www.groupjive.com but not www.groupjive.org. If I log into my server (in another state with an authoratative DNS server) and lookup www.groupjive.org I get the following address: 84.200.240.54, which goes to itsbserver.org.
If you can, please pass this information on to them.