I guess I spoke (typed?) too soon about the server not locking up anymore. It just did it again.
I've been working on websites for 12 years (my first domain was registered in 1997) and I've never have such an unreliable web host. In all the years I was at Rackspace and later Hostway I never had any significant down time. The one time there was a problem Hostway replaced the server immediately. 1and1 doesn't even seem surprised or concerned that the server is locking up. It appears that unreliable servers are the norm at 1and1.com. While their website would make you think they're a commercial web host, their support is more geared toward the casual website. One that it doesn't matter if it's down.