Office 2010 Web Apps
Microsoft is beta testing the web versions of their 2010 Office Suite. Office web apps will be available for free, but will be watered down versions of their bigger brother Office 2010. Still they should be feature rich compared to Google Docs and provide some nifty syncing tools to those that have the desktop version as well. LiveSide has a good preview of what it looks like right now, but it will continue to get polished over the next few months.