Starting today users in US will be able to print mobile documents from Google Docs, emails from Gmail for Mobile on the go with Google Cloud Print.
To use this features, first you will have to connect a printer to Google Cloud Print, and voila.. you will be able to print a doc from office printer sitting at home. To print, just open a document in Google Docs or an email in Gmail in your mobile browser and choose “Print” from the dropdown menu in the top right corner. You can also print certain kinds of email attachments (such as .pdf or .doc) by clicking the “Print” link that appears next to them.
You will need a phone running on Android 2.1+ to use this.