I was disappointed by the speech. Your mileage may vary, of course. But it was basically standard Democratic Convention Boilerplate: nothing we haven't seen before from Obama, or for that matter, every Democratic presidential candidate in living memory.
Maybe the problem is that Obama has given too many good speeches. All Kerry or Bush had to do was show up on the podium and not vomit on their shoes, and we were impressed. Obama would have needed to channel Martin Luther King, Jr on a steroids to knock our socks off. This implies, that McCain will get a bigger bounce than Obama from his convention appearance; we'll see.