How can i get my ipad2 to print without buying a new printer or router?

I Purchased an Ipad2 but cannot get it to print on my network. Currently I email whatever needs printing to myself and use my PC to print. Is there a better way?

 

You need to have a printer that is AirPrint enabled

 

If you have a Mac running OSX Snow Leopard or Lion, there is a work around.