Earlier in the week, Microsoft announced that they have surpassed 20 million users on their Office Web Apps, which include Word, Excel and PowerPoint. Office Web Apps easily integrates with your Windows Live ID and a number of online services from Hotmail, Facebook and live.com. Docs.com also integrates with your SkyDrive, which offers up to 25GB of storage, can be accessed anywhere with an Internet connection.
Microsoft Office Web Apps can also be downloaded to your desktop and used with Microsoft Office, unlike Google Docs, which is strictly online.
Like Google Docs, users can share documents with anyone online, allowing friends to make changes to your documents.