Go to /System/Library/Screen Savers.
right click / option click on one of the screensavers, choose show package content
navigate to Contents/Resources, there you will find the pics.

The iPhone and iPod touch have provided all software developers with a level playing field—developers working alone have the same access to consumers as multinational software publishers. Very cool indeed! To make your application stand out from the crowd, though, it has to have that something extra. You must learn the skills to take your apps from being App Store filler to download chart-topping blockbusters.

Developers with years of experience helped write this book. Spend some time understanding their code and why they took the approach they did. You will find the writing, illustrations, code, and sample applications second to none. No matter what type of application you are writing, you will find something in this book to help you make your app that little bit cooler.

The book opens with Wolfgang Ante, the developer behind the Frenzic puzzle game, showing how timers, animation, and intelligence are used to make game play engaging. It moves on to Rogue Amoeba's Mike Ash explaining how to design a network protocol using UDP, and demonstrating its use in a peer-to-peer application—a topic not normally for the faint of heart, but explained here in a way that makes sense to mere mortals. Gary Bennett then covers the important task of multithreading. Multithreading can be used to keep the user interface responsive while working on other tasks in the background. Gary demonstrates how to do this and highlights traps to avoid along the way.

Next up, Canis Lupus (aka Matthew Rosenfeld) describes the development of the Keynote-controlling application Stage Hand, how the user interface has evolved, and the lessons he has learned from that experience. Benjamin Jackson then introduces two open source libraries: cocos2d, for 2D gaming; and Chipmunk, for rigid body physics (think “collisions”). He describes the development of Arcade Hockey, an air hockey game, and explains some of the code used for this.

Neil Mix of Pandora Radio reveals the science behind processing streaming audio. How do you debug what you can't see? Neil guides you through the toughest challenges, sharing his experience of what works and what to watch out for when working with audio. Finally, Steven Peterson demonstrates a comprehensive integration of iPhone technologies. He weaves Core Location, networking, XML, XPath, and SQLite into a solid and very useful application.

Software development can be hard work. Introductory books lay the foundation, but it can be challenging to understand where to go next. This book shows some of the pieces that can be brought together to make complete, cool applications.

Who is this book for?
All iPhone application developers with any level of experience or coming from any development platform

Summary of Contents
Wolfgang Ante - Designing a Simple, Frenzic-Style Puzzle Game
Mike Ash - Mike Ash’s Deep Dive Into Peer-to-Peer Networking
Gary Bennett - Doing Several Things at Once: Performance Enhancements with Threading
Matthew “Canis” Rosenfeld - All Fingers and Thumbs: Multitouch Interface Design and Implementation
Benjamin Jackson - Physics, Sprites, and Animation with the cocos2d-iPhone Framework
Neil Mix - Serious Streaming Audio the Pandora Radio Way
Steven Peterson - Going the Routesy Way with Core Location, XML, and SQLite

Info:
Are you anxious to get started with the new release of Photoshop? If you learn best visually, then you’ll love the updated and expanded coverage found in this tutorial.

- Full-color throughout, this book offers newly revised design features that allow for larger screen shots for better navigation and a more detailed look at each tasks’ step-by-step instructions

- Packed with additional pages and expanded coverage of cool new tasks for you to accomplish

- An approachable teaching style makes Photoshop CS4 accessible for beginners and instructs visual learners of how to put this application to work for them

- Covers the most important features of Photoshop, including importing photos from a digital camera, retouching and repairing damaged photos, enhancing digital images, adding custom 3D effects, and editing images for posting on the Web

- Walks you through creating a Web photo gallery, incorporating graphics into desktop publishing programs, using palettes and layers, compositing, applying gradients, and setting type and filters

Start The Summer Off With Good Health!

Maybe the beach is your favorite place to be during the summer. Maybe you love outdoor sports, or basking in the sunlight. No matter what, summer has a little something for everybody. In order to enjoy summer's many pleasures, it's important to treat your body right and stay healthy. Taking vitamins is also a great way to optimize your health so you stay healthy all summer long.* Everyone should take a multivitamin to get their proper nutrients each day, but there are plenty of other supplements that can keep you feeling great during the sizzling days of summer.*

Before you can follow these instructions you must have a jailbroken iPhone and you must be on the 04.26.08 baseband(modem firmware). This means that you must be running the 3.0 firmware and have used PwnageTool, RedSn0w, or PurpleRa1n to jailbreak. YOU MUST ALSO (FOR THE TIME BEING) HAVE ACTIVATED YOUR IPHONE WITH AN OFFICIAL APPLE CARRIER. NO HACTIVATION SUPPORT YET.

Then you need to follow one of these tutorials to JailBreak before unlocking: http://tunguyen.name/home/read.php?131

These are instructions on how to jailbreak your iPhone 3GS using PurpleRa1n for Mac OS X. Once you have completed this tutorial you will be able to unlock your iPhone 3GS using this tutorial.
Note*** MAC & PC just the same...just go to the website then download the file for MAC or PC
This is a preliminary jailbreak and thus some apps such as Winterboard will not work. You may want to consider waiting for the jailbreak release from the iPhone Dev-Team if this is important to you.

1. Your device must be jailbroken.
2. Make sure you have WinterBoard installed via Cydia.
2. Make sure you have the modmyi source installed in Cydia.
3. Search for SpringBoard Clock-English in Cydia, run the install.

4. Open WinterBoard and activate the SpringBoard Clock-English Theme.