The Folks at Collobos have made a great application for only $10.00 which will allow you to use Airprint to print from your iPhone or iPad using iOS 5.0.1.
This application works great, the application is named FingerPrint which works on Windows and Mac.
It will allow you to use any printer connected to your computer to use Airprint. The application has a free trial so you can try before you buy.
Some of the great features included with FingerPrint are that you can also send documents to your dropbox folder on your pc, and open the document on your computer.
Check it out. I put the links below for the Windows and Mac versions also a link to their website.
FingerPrint requires OS X 10.5-10.7, Windows XP SP3, Windows Vista, or Windows 7
iDevices running iOS 4.2 or later will see AirPrint™ enabled printers.
Collobos Home Page: http://www.collobos.com/index.html
FingerPrint uses Bonjour zero configuration networking to make setup simple and painless. Here is the link to Bonjour in case you need it. http://www.apple.com/support/bonjour/