iPad, iPhone, and iPod touch all have AirPrint as a standard part of iOS, but it only works with some of the newest HP printers.
I didn't know that you could print with a downloaded app. I will check this out since I bought my printer before AirPrint came out. Thanks for the information.
Check out the app, Printer Pro to print on the iPad.
I just bought a brand new HP wireless printer, and AirPrint is nowhere to be found in the IPad.