Reddit mentions of Beginning iPhone 4 Development: Exploring the iOS SDK

You're going to need to understand quite a few things to pull that off. If you can work through http://www.amazon.com/gp/aw/d/0321711394/ref=mp_bxgy_p_dp_y and http://www.amazon.com/gp/aw/d/143023024X and you'll be well on your way!

There are some really good resources~ I personally prefer books though.

I strongly recommend this book:
http://www.amazon.com/Beginning-iPhone-Development-Exploring-iOS/dp/143023024X/ref=sr_1_1?ie=UTF8&qid=1312496135&sr=8-1)

> (assume i have programming background in javascript/web front end.)

Um, are you sure you're ready to jump into iOS development?

Unless I'm reading this incorrectly, it doesn't seem like you have any C or OOP (like Java) programming experience. You'll definitely want to be at least comfortable with C-like syntax and message-passing, inheritance and objects, etc.

Actually, I'll have you answer that for yourself. Watch the first lecture in the iOS dev series from Stanford on iTunes. Around minute 11 the professor goes over what concepts you need to understand in order to be able to follow along with the course. If you don't understand all of the concepts listed, then you aren't ready yet.

Also, you've got to have a Mac. Have at least a Mac Mini (which are the cheapest Macs you can get refurb'd / used).

Here's what I would do assuming I am correct about your programming experience:

1. Learn C on the Mac.

It's for beginners, and will go over the basics of C. Objective-C, the programming language for iOS, is a strict superset of C, so they share a lot of syntax.

1.a The C Programming Language (recommended)

This one isn't for beginners, and is a bit stale, but is the de facto book for learning all of the intricacies of C. While it isn't absolutely necessary, the better you understand C (including pointers, memory, etc.), the easier time you'll have with iOS dev. I absolutely recommend going through it in its entirety, though this isn't necessary. It'll also be good to know C in the future if you plan to pursue software development.

2. Programming in Objective-C

This will teach you Objective-C, related OOP, and using XCode 4.

3. Beginning iPhone 4 Development

This will probably rehash some stuff related to Objective-C and XCode, but for the most part is a great introduction to iPhone development.

Use this book in tandem with the Stanford lecture series. Read the first few chapters, watch the first 2 lectures, do the homework exercises as if you were in the course along with the examples from the book, and just go from there. There might be some redundancy, but I think the combination of reading, listening, and doing will really help you understand the material.

If you need short tutorial refreshers at any point, Cocoa Dev Central is a great resource.

From there, you should be able to start making your own apps, and just use Google, StackOverflow, and http://developer.apple.com/ for all of your questions not previously answered or if you get stuck.

As you go through the process of learning all of these new programming concepts, try to develop ideas for what apps you want to develop. As you learn more, try to piece together how you would accomplish certain aspects of the ideas, and if you can, maybe even code the bits (like certain functions) you can.

There are no set milestones.. it's a gradual process of learning and getting better at programming and iOS development. Your goal should be to just create your own working app entirely based of your own ideas and work.