updated 01:15 pm EST, Thu November 18, 2010
Still waiting on iOS 4.2 update
Ecamm has launched Printopia, a new Mac printing app. The software tricks iOS 4.2 devices into recognizing any Mac printer as an AirPrint-compatible device. Users can additionally direct files to "virtual" printers, for instance output as a JPG or PDF file on a Mac. Another option includes printing to a Dropbox folder for online sync purposes.
The software costs $10, and requires Mac OS X 10.5 or later. A free seven-day demo version is also available. iOS 4.2 has yet to become available through iTunes, however, and so Printopia is only currently useful for people with access to the iOS 4.2 gold master, intended for developers.