I have a problem I've been working on for over an hour. I have a uni MBP that has wireless internet and printing through an airport express (just internet and printing, not using Airtunes feature). I bought a MBA last night and am trying to get it to work as well. It works just fine as far as wireless internet, but the wireless printing simply will not work. I have the printer listed in my MBA and all airport express utility settings seem to be A-OK, it just will not print wirelessly from the MBA. The printer queue just gives me the old Error 300: The printer does not respond. Ideas?