The linuxmce.org and linuxmce.com domain have been registered (and paid for by Aaron B) with GoDaddy for quite some time. Unfortunately, every credit card expires at one point or another, the connected email address was no longer valid, so nobody knew that some payments were due.
After help from Aaron and hari things are back to normal. We will now foot the bill for the yearly renewal, but have much better control over it as well.
Everything should be back to normal.