How to print from your iPhone or iPad directly, with or without AirPrint

You can print from your iPhone or iPad by adding a printer with AirPrint, downloading your printer's app, or connecting a USB ...
Geeky Gadgets

How to print from iPhone wireless using AirPrint

The Apple AirPrint printing technology features include “easy discovery, automatic media selection, and enterprise-class finishing options” says Apple. For a complete list of all the available ...

How to print emails from your iPhone using either the default Mail app or Gmail

You can easily print emails from your iPhone from Mail or Gmail with a wireless printer. Here's how to do it.
Ars Technica

AirPrint may not print to shared printers out of the box

Enterprise and educational users hoping that AirPrint will help them get documents out of an iPhone or iPad are likely to be disappointed if iOS 4.2 is unable to print to shared network printers this ...