I was, uh, trying to be a bit less grand in scope :) Obviously it would be nice to catch some of these things and think through them, but I'm more concerned with the concrete-and-fixable-RIGHT-NOW issue, which is 'we have a way to tell if a machine is online/offline, and we have many apps which should fail gracefully if they are offline. What should they say when they fail?' So, uh, any suggestions? :)
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