Hi guys,
I went onto the GMAC website and saw this message:
"We are upgrading the technology behind our GMAC and Executive Assessment websites the week of August 6th. While this should have no impact on users, we recommend accessing any deadline-specific items, such as score reports or GMASS, either before or after this week if possible. For any questions or concerns, please contact us.think this may be the reason why the site is down"
I think this may be the reason why the GMAT prep site is down.