Print from your phone with Gmail for mobile and Google Cloud Print
If you need to print an important email attachment on your way, you can use this new service from google. With Gmail for mobile and Google Cloud Print — a service that allows printing from any app on any device, OS or browser without the need to install drivers – you can.
Steps:
1. Install Chrome browser in your computer if you didn’t have
2. Now add your google cloud print account in Options àUnder the Hood in Chrome browser
3. Then print from any mobile device
You can also print eligible email attachments (such as .pdf or .doc) by clicking the “Print” link that appears next to the attachment.
How to steps:
http://www.google.com/landing/cloudprint/win-enable.html
Source : http://gmailblog.blogspot.com/2011/01/print-from-your-phone-with-gmail-for.html