Just a short blurb: Google Drive is now live, offering 5GB of online storage.
The best feature is connecting all the various Google apps with Drive. Sharing files larger than 20mb with friends/colleagues is also a big plus. Also, it's free. So, get started today.
This is not the only option for free cloud storage. Amazon Cloud Drive(5GB), Box (5GB), iCloud, and Dropbox (2GB) all come to mind.
Sign up for all of them and reap the combined 17GB. (excluding iCloud)