How odd is it that Twitter offers up a 503 error again? This means that it is very possible that the servers are overly taxed. I cannot fathom how such traffic might be arrayed, though.
This poses an interesting point. With all of the chatter about Web 2.0 over the past few years, where does our infrastructure fit into the picture? While talking about infrastructure is not as sexy as showing a slide-sharing presentation, the slide-sharing presentation would not be possible otherwise.
Our economy pursued flash over substance. As the flash fades, what is there really to fall back on?