Apple updated the iOS versions of its iWork apps (Pages, Numbers, Keyntoe) to version 1.3. The updates are iOS 4.2 compatible and support multitasking, and AirPrint.
AirPrint lets you print email, photos, web pages, and documents right from your iPhone, iPad, or iPod touch. There’s no software to download, no drivers to install, and no cables to connect. But for now it only works with certain HP printers.