A free cloud storage service is available for you called Ubuntu One. At initial launch of free storage service you could have 2GB space, but as the company is now celebrating 1 million users this week, Ubuntu One online cloud storage is now 5GB space.
Ubuntu One Basic account has now been upgraded to Ubuntu One Free and users can now enjoy free 5GB cloud storage while they set up their pre-existing accounts or registering for new account. You can even get yourself a premium account while paying only $2.99 where you get up to 20GB of storage.
If you are an Ubuntu user, you can sync your Tomboy Notes and FireFox bookmarks with the service.