Dropbox is still the favorite cloud-based storage option, but it's great to see ownCloud nipping at its heels. No, not because I have anything against Dropbox (I use it myself), but because I love to see open-source alternatives whenever possible.

• Dropbox 35.5%

• ownCloud 16.3%

• Google Drive 16.2%

• Ubuntu One 7.1%

• rsync 6.8%

• Other 5.2%*

• Amazon S3 4.8%

• SpiderOak 4.6%

• Copy 1.7%

• Box 1.4%

• AjaXplorer .4%

• Norton Zone .1%

*Popular write-ins: BitTorrent Sync, MEGA, Skydrive and Wuala.