It won't be easy: BlackBerry's App World, Palm's App Catalog, Microsoft's Windows Mobile Catalog and Google's Android Market have only a fraction of Apple's offerings.

CNN: New iPhone 3GS heats up smartphone wars

Running Windows is all well and good, but when you're running the RT flavor, which strips compatibility with the entire, massive and still-swelling catalog of Windows applications, you're left with a desktop-class operating system completely bereft of any desktop apps.

ENGADGET

While Windows Phone has been gradually building its catalog in the years since it launched, BlackBerry's debut lineup was surprisingly strong.

ENGADGET: Switched On: Battling for the bronze