This tutorial will show you how to jailbrake and unlock your iPhone 3G or 3GS

You are of course doing everything on your own risk, but I'm pretty sure that this is perfectly safe as you can always roll back to the original Apple iPhone settings by doing full hard reset of your phone.

I just bought my 3GS iPhone one or two months ago and I did the unlock immediately. Still works and I am able to install any possible application on it and have even any sim card installed.

The entire process may take up to 15 minutes and is perfectly straight forward.

If you are here I am guessing that you are interested in iPhone/iTouch development and are looking for a place to start. Due to Apple’s NDA on the iPhone SDK there really isn’t much information out there on getting started with iPhone development, by writing this tutorial I hope to give people the confidence to get started developing on the iPhone and also to help myself get my head around it. Lets get started

In this tutorial by HDiPhone we will be making a ProgressView. And also a button to start it. When you click the button the progressvew will load until it hits the end and stop.

If you love Macs and are interested in learning how to build applications, this is the first in a series of screencasts showing how to build the interface.

In the second part in a series showing how to take the GUI interface of our calculator and set up event handling through actions and outlets using Xcode 3 on Mac! The third part of the series is unfortunately too long to post on youtube (25 minutes). It can be viewed on the blog at: http://strainthebrain.blogspot.com or downloaded here,

Objective-C is a powerful, easy-to-learn, object-oriented extension to C. Unlike in C++, advanced object-oriented features like dynamic binding, run-time type identification, and persistence are standard features in Objective-C which apply universally and work well together. Moreover, the support for descriptive message names (a la SmallTalk) makes Objective-C code easy to read and understand. Objective-C is supported by the GNU and NeXTSTEP C compilers.

I found this tutorial a while ago and I have no idea who's the author or the original url, if you know please let me know and will add the credit

Objective-C is the primary language used to write Mac software. If you're comfortable with basic object-oriented concepts and the C language, Objective-C will make a lot of sense. If you don't know C, you should read the C Tutorial first.

This tutorial is written and illustrated by Scott Stevenson

In the first lesson Tim Layton gets you started with Xcode and Objective-C to write iPhone applications. Tim is starting you at the very beginning and will walk you through the entire process of developing real iPhone applications by building a strong foundation in Objective-C and eventually in the iPhone SDK (Cocoa Touch).

In the second Tim Layton walks you through the simple process of starting and creating your first iPhone application using Xcode and Interface Builder. Tim shows you how to use Photoshop to create the application icon as well. The next set of lessons will focus much more on learning the core language now that we have the basics out of the way. To view the written part of this lesson and more information go to http://techtips.timlaytonllc.com

A tutorial to help new iPhone programmers get started by Anthony Frizalone