Google Drive, Dropbox, iCloud, and OneDrive are all available to try for free (with limited storage). So far I have used Dropbox and OneDrieve and like Dropbox since it handles better on the PC and my iPad. OneDrive is improving and I have used iCloud on my iPad mostly for pictures, there is a PC app available, so you can access your pictures and whatever else you put on it
What is your experience?
For starters, here is the free storage as of now:
Dropbox 2 GB
One Drive 15 GB
Google Drive 15 GB
iCloud 5 GB
If there was an online storage option that would store my files encrypted (including file names) where the encryption key was stored only on my computer then I would likely use it. I realize that I can use truecrypt to create a container which I could then use on DropBox, but that requires re-uploading an entire container for even minor changes. A while back I looked at SpiiderOak which was promising just that in the near future. Perhaps it's time for another look.
I store all my code samples on DropBox, this way it's synchronized between my desktop and my two notebooks.
Using too many different clouds can be a pain, since they take time synchronizing at startup.
I installed pyzo from http://www.pyzo.org/ on OneDrive and it seems to work well as a portable scientific python implementation.
I like SugarSync. It's not free - I think I paid $40 for a year's service. BUT what it does allow you that most others dont is to sync folders outside the dedicated folder (like dropbox folder or google drive folder) on your computer. I find this invaluable for keeping a synced version of the current version of my web projects. I don't have to FTP, SVN, git or anything else. I tried symlinking folders to Dropbox for example and although it achieved the initial upload - it didn't sync thereafter. So sugarsync is perfect for me. It all depends on your needs though. I always felt a little uncomfortable about placing everything inside a dropbox folder - or in my particular case sending files to a dropbox folder, only to find that the version in the cloud wasn't the most up-to-date one as I'd forgotten to send it to local dropbox folder after each save.