As someone who has always wanted to learn Objective-C but has never been able to find up-to-date and easy to understand tutorials on building an app, this is something I can get behind.
I'd also recommend the free tutorials[2] and the more in depth ebooks[3] at Ray Wenderlich's site (the content is far better than the site's design would have you believe).
Whatever you learn, make sure it covers iOS6 and is ARC based, the older tutorials are very dated and will only confuse.
Now, if someone could point me in the direction of some really good Android tutorials…
[1]http://www.stanford.edu/class/cs193p/cgi-bin/drupal/
It's basically a Railscasts ripoff (and I mean that in the best way - I'm a paid subscriber to both).