Cloud computing is becoming more and more populair. Another simple application is sharing your OneNote with SkyDrive. OneNote 2010 has by default an option to share/save your OneNote documentation on fileserver, SharePoint and Skydrive.
By a few simple mouse clicks you’re able to publish your OneNote documents to SkyDrive.
Before publishing your documents you must have a valid Windows Live ID.
When signed in successfully you can set up your folder structure and decide whether or not to share your documents with others.
Another example of cloud services is Office Web Apps . For eaxmple OneNote documents can be edited by the OneNote Web APP
See also my previous post Map your SkyDrive as local drive
Special thanks to Otis J