There are a few options to get Airprint to work
Look at http://archlinuxarm.org/support/guides/applications/cups-apple-airprint
is one way or you could use Airprint Acttivator here http://netputing.com/airprintactivator/
AirPrintActivatorv1.1.3 AirPrintActivator v2.2b4
or the old fashioned, non Apple happy way by using files left in 10.6.5 beta
Others that offer more advanced options are Fingerprint and my favourite Printopia