[zdw]

One question: What happens when a piece of middleware fails respond, becomes overloaded, goes out of business, etc?

[railsjedi]

I think the App.net client should just show a little warning saying "{{middleware_name}} no longer responds. [Disable] [Retry]"

[1234the]

I think it's possible that the above comment about the middleware had to do with the fact that afaik, most middleware implementations are chained so if one fails then the next is never called.