Who will be taking responsibility? Tim? Phil? Jeff? Angela?
Akamai and their subsidiary, Edgesuite. Those are the external vendors that provided bandwidth for the keynote and for the Apple store. That's assuming any heads must roll, which I disagree with, and I'll explain why.
Like I said another post like this calling for blood: Apple, Google and similar companies would be stupid to buy the bandwidth and servers they think they need for what amounts to a single day of frenzied traffic, and then let that stuff sit unused the rest of the year. So they farm this stuff out to third parties (like akamai), who make educated guesses about how much bandwidth is enough.
Regardless, the demand clearly outstripped both Apple's and Akamai's expectations.
The other option would've been overspend by tens of millions of dollars to have
too much bandwidth (assuming that much bandwidth even
exists globally... we don't even know that that's the case), and then Apple gets a PR black eye: look at all this money they spent and NO ONE CAME. OMG SELL THE STOCK! iPhones aren't selling out fast enough, APPLE IS DOOOOOOMED!
Apple right now is in a damned if you do, damned if you don't situation. Either the buyers are pissed because they can't get in, or the lack of site crashes means no one is interested.
Right now, Apple's stock is up, and people are still trying to buy the phone. So I doubt anyone should be fired.