We have the same problem. Some kind of communication would have been nice:
If iClans decided to end the free basic-membership, those affected should have been notified quite some time before just pulling the plug.
If there are some unexpected problems, i.e. server crash or so, it would be nice to get some feedback after a few hours passed. The site structure is still there, just the forum/content is missing. Maybe some database went down?
So please, talk to us @iClan Admins.