Got a new iPhone? an Android phone? need to share your data among devices? "The Best Way to Store Stuff in the Cloud" from Gizmodo dated 9-28-2011 reviews a number of options including Amazon's Cloud Drive, SugarSync, Dropbox, Google and Apple's iCloud. Before you get started you might want to take a look at a good overview and introduction to cloud-computing -- from EDUCAUSE "7 Things You Should Know About ... Organizing Files in the Cloud."
Websites listed:
http://gizmodo.com/5828035/the-best-way-to-store-stuff-in-the-cloud
http://net.educause.edu/ir/library/pdf/ELI7073.pdf