Tips for transitioning from Visual Basic to Xcode

I've been programming in VB.net for a while now, and I finally got access to a mac to make ipod apps. What are some useful sites, videos, etc. that could help me get used to Objective C and the Xcode IDE? I've stumbled upon the samples on the apple dev site, but none of them really give good examples which I could learn the syntax of the language from.

Thanks for the help, Obje开发者_如何转开发ctive C is really a big change from VB.net!

Here are some helpful starter references from the Apple site, first for Objective-C itself, then for the Cocoa frameworks.

Learning Objective-C: A Primer

Cocoa Fundamentals Guide

There are also "getting started" videos available from http://developer.apple.com/iphone (you have to register as a developer to get access, but that's free)

You might want to take a look at MonoTouch if you like working with .Net. As far as I'm aware, it only works with C#, but it will let you use the .NET api to program for the iPhone. Might be worth looking into if you don't want to learn Objective C.