Ars Technica: "Microsoft's Windows Live SkyDrive offers 25GB of storage in the cloud, for free. It has a range of neat features: shared photo albums, integration with the new Hotmail and Office Web Apps, and RSS feeds. OneNote 2010 integrates directly into SkyDrive, making your notes available wherever you are—all sorts of good stuff.
Microsoft's Live Mesh offers the ability to sync a couple gigabytes of data with cloud storage, and provides remote desktop-like access to PCs in the "mesh."
Microsoft's Windows Live Sync offers file syncing directly between machines, supporting large files and quantities of data. It even provides access to non-synced files, enabling remote access to files over the Web."