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iOS 4.2 is coming this November. With iOS SDK 4.2 beta, you can add exciting, new features to your apps including the capability to print directly from iPad, iPhone, and iPod touch. iPad apps can now take advantage of multitasking, Game Center, iAd, and more. iOS Developer Program members can log in to the iOS Dev Center to learn more and download the beta releases.

If you plan to incorporate Game Center into your app, it"s important to correctly enable Game Center in iTunes Connect before you submit it for review.To enable your app for Game Center, follow these steps:Go to the Manage Game Center page from within the Manage Your Applications module in iTunes Connect and click on the Enable button. This will allow you to test your app in the sandbox and set up metadata for leaderboards and achievements.Go to the Version Details page and click on the Enable for this Version button. This will allow this specific version of your app to access Game Center once its live on the App Store, and lets you enable or disable leaderboard, achievement and multiplayer settings on a per-version basis.

Nearly six years ago Google launched a new project to promote and support open source software development: Google Code. Back in those days we had Intel Pentium 4 processors that ran at 533 MHz (or 800 Mhz if we were lucky), and contained 125M transistors using a 90nm process. Amit Deshpande and Dirk Riehle, working for SAP Research, uncovered evidence that in 2004 there were approximately 125M source lines of code (SLOC) of open source software in the world. Fedora Core 3 had 1652 packages, and SE Linux policies protected only 13 of them (apache , dhcpd, mailman, mysqld, named , ntpd, pegasus, portmap, postgresql, snmpd, squid, syslogd, winbind). Six years is a long time ago! At that time, Google Code did not treat all OSI-approved licenses equally. Some were definitely more equal that others. But a lot can happen in six years...

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If your app requires certain hardware features to run properly on a user"s device, you need to add a list of those requirements to the UIRequiredDeviceCapabilities key in your Info.plist file. However, you should only add keys for features you must have. Setting a key to false is not the same as leaving out the key. When you set a key to false, you are instructing your app to run only if the device does not have the requirements. Ensuring that you have properly set your UIRequiredDeviceCapabilities key is important so that users don"t install your app on a device that lacks the necessary hardware. You can learn more about properly indicating specific hardware requirements in your Info.plist file by reading Understanding the UIRequiredDeviceCapabilities key.

The newly published App Store Review Guidelines are now available to iOS Developer Program Members. The Guidelines provide guidance and examples across a range of iOS development topics, including user interface design, functionality, content, and the use of specific technologies to help you prepare your apps for the approval process.