Chris Matthews apparently creamed himself over its fantasticness. Since he is an idiot, that's probably bad for Obama.
Seriously, I'm sure the already-converted loved it. Whether it affected anyone else in a way favorable to Obama I can't say, but two-minute spots are more than I want to see from even my own candidates. Obama is better at saying nothing beautifully than anyone around, but a whole half-hour of nothing doesn't strike me as likely to bring over a bunch of people who are still holding out for a sign at this point. As far as I gather from the morning coverage, and reading between the lines of it all, it seems like the speech was indeed another half-hour of Obama worship without any substantive policy content, domestic or foreign.