At 1:02 pm I noticed the server was down again and restarted it. I've lost count of how many times it's locked up. I think it's now locked up more times after 1and1 "repaired" the server than before they worked on it. It's certainly locking up more often now.
1and1 still hasn't contacted me about the problems I emailed them about last night. I guess they never will. At any reputable hosting company a server that crashes again and again would be a top priority. 1and1.com's management apparently doesn't care about their customers.