LogMeIn is a service that allows you to remotely access someone else's computer (with their permission and cooperation, of course) so that you can help them fix a problem. It's much easier than having them try to explain the problem over the phone, or you having to drive to their house.
This past April they launched Cubby, a new cloud file sync, share and storage service. It's still in beta, but you can enter your email to get an invite. You can sync your files across all of your computers, tablets, and smartphones easily. You can share files and collaborate on them with others. You don't need to reorganize your files either. You can just select any folder on your device to by synced and make it accessible anywhere.
They have just announced that users can ear more memory, the free account starts with 5GB, by having friends sign up for an account. For every referral that signs up, you get 1GB of extra space. That's pretty good. Have a few friends sign up and you can easily end up with some serious storage space.
They have also announced some improvements to the iOS app and some other new features.
Read more about this announcement: http://www.engadget.com/2012/07/13/logmeins-cubby-offering-up-1gb-for-referrals-tells-dropbox-whe/
Read my full review here:
World Backup Day - make sure your data and files are backed up! - lots of cloud file sync,share, backup services listed here. All with free options.
Zumodrive shutting down - here are some alternatives for file backup and sync