im running 4.3.2 on my iphone4 and i cant get the print to work on anything!!! it doesnt ever find my print thats on the same wifi setup. what can i do or what am i doing wrong??
Could be that it's not supported by AirPrint, but in the meantime you could use a Mac App called Printopia which uses your Mac as the middle man so you can print from your iPhone via your Mac.
If you don't have a printer that natively supports AirPrint, you can run this app on your Mac and it will allow you to print on any printer on your network (Mac must also be on the network). I use it to print to a Canon MX700 from an iDevice in our house--nothing to install on your iPhone.