1. Buy a AirPrint enabled printer; see list below
2. Run the CD provided and setup as network printer; this will setup your printer to the same network as your iPad
3. Start printing from your iPad without wire
iOS AirPrint Printers http://support.apple.com/kb/HT4356
How to Print from Your iPad: Summary of Printer and Printing Options
Print from iPad / iPhone without AirPrint
How to Enable AirPrint on a Mac and Use Any Printer
iPad Power: How to Print
Check out these print apps for the iPad.
Print Utility for iPad ($3.99) http://itunes.apple.com/us/app/print-utility-for-ipad/id422858586?mt=8
Print Agent Pro for iPad ($5.99) http://itunes.apple.com/us/app/print-agent-pro-for-ipad/id421782942?mt=8 Print Agent Pro can print to many non-AirPrint and non-wireless printers on your network, even if they are only connected to a Mac or PC via USB.
FingerPrint turns any printer into an AirPrint printer