I was wondering if iOS 4.2 supports printing through wifi and ethernet based HP printers. The reason I ask is because walmart is going to have a pretty good deal on hp wireless printers and I figured now would be a great time to upgrade...assuming it works with Airprinting. The ones I am eyeing is the HP Photosmart Plus Wireless Printer and the HP Officejet All-In-One Printer. The first being wifi the latter being ethernet based. So does anyone know if these work under iOS 4.2?