If any of you have upgraded to OS 4.2.1, you've probably noticed that AirPrint is rather 'neutered' from what it was originally made out to be. This is due to a lame agreement with HP that incorporates HP's ePrint software. Bollocks, I say.
Well, here's a workaround:
http://jaxov.com/2010/11/how-to-enab...ce-on-windows/
Follow the above tutorial on the Windows PC that hosts the printers. Ta-da! Tested it this morning, worked like a charm. Even opened a small information box on my iPhone that told me that my printer was running low on ink. Pretty slick.