His answer might surprise you. Here's what Arianna writes:
Talking to Steve Jobs after his speech, I got a hot tip on how to be one of the first people to score a new iPhone when they go on sale in June. "Don't go to an Apple store," Jobs told me. "It will be a madhouse there. People will be lined up around the block, sleeping on the sidewalk to get one. Go to an AT&T/Cingular store. Most people don't know that they will be selling them too." Uh, they do now, Steve.
Full disclosure: I write for the Huffington Post as well.