Strangely enough, at 8:26pm EST, their site is now back up...not sure exactly what time it came back, though. A few features updates, but just the normal, I don't see anything majorly revamped.
EDIT: Ahh, here's the story behind it:
IMG Server Downtime
2:49 PM | Andy Largent | Comment on this story
We here at IMG would like to apologize for the recent website downtime. The server hosting IMG required an unexpected move by our ISP yesterday, and the new DNS is now propagating through the internet. It's likely some folks will be unable to access the site for a few more hours, but thanks to those of you who can for visiting.
We appreciate your patience in the matter and will now return you to your normally scheduled IMG experience.