Source: http://feeds.feedburner.com/~r/lifehacker/full/~3/311416035/cloudprint-stores-and-prints-documents-at-home-from-any-browser
Print any document from your computer to any other internet-connected PC with webapp CloudPrint. The service, by the folks at Hewlett-Packard, is built around the notion that you'll use it primarily as a mobile tool, binding your login to your phone number and providing SMS updates of the status of documents you print through CloudPrint. You can print a document with CloudPrint in three ways: 1) Install the Windows-only CloudPrint driver and select CloudPrint as your printer, 2) email documents as attachments to your_phone_number@cloudprint.net, or 3) from the desktop or mobile web interface. CloudPrint is free to use, and the driver is currently Windows only. For an alternative, check out previously mentioned PrinterAnywhere.