My experience (running ~7 machines in Linode's NJ datacenter) was that around once every two months I wake up with an email saying "we restarted server X due to

My experience (running ~7 machines in Linode's NJ datacenter) was that around once every two months I wake up with an email saying "we restarted server X due to emergency maintenance". It's not annoying enough to switch - yet. And EC2 has the wrong CPU/Memory ratio for me (too little CPU - Linode rocks here!).