Ray's site has been one of the best resources that I have found. I had the same question a year back and ended up just going through his tutorials.
If you're talking about in person, I did a Pragmatic Studios course and it was great. Highly recommend if you can afford it and do the travel.
Otherwise, Ray Wenderlich online and the Big Nerd Ranch book are my favorites.
Other good idea is to pick up the Big Nerd Ranch Guide and just sit down and walk thru it. It's really all you need.
Yeah that's what I'm doing. Started last week. I saw their bootcamp was 5K for 9 days. Insane. Though there is definitely a market for a GOOD iOS dev bootcamp IMO.