Hi,
I had a lot of trouble getting Airprint to work on my new HP Photosmart Plus.
I have an iPad 2, PC with WIndows 7 and Linksys WRT110 router.
Wireless printing from PC to printer was no problem from the moment I installed the printer.
Also the iPad and printer seemed to be ok.
The iPad however wasn't able to 'see' my new printer when trying to use Airprint.
After spending hours and hours of reconfiguring/reinstalling/upgrading all my hardware (printer, iPad, router) and software (Windows firewall, AVG Security) and being on the phone with Apple and HP Helpdesk for hours to no avail I was advised to have the printer and iPad tested, meaning I would loose them for several days or up to a week.
The day I wanted to return my printer to have it tested I stumbled upon this article:
http://blog.wouldbetheologian.com/2008/12/warning-on-linksys-wrt110-firmware.htm l
I downgraded the firmware of my router to the very first version, as described in the article and voila:
right after the change my iPad could recognise my printer and printing via Airprint works all right.
Somehow Airprint (Bonjour) only seems to work with the oldest version of the firmware of my router.
This solution isn't pretty and far from ideal (having to use the old firmware), but it finally solved my Airprint problem.
Greetings,
Jasper.