Over the past few of weeks I've been using Live Mesh to capture my ideas for this blog. If you haven't checked it out, it's worth a look. It allows you to store files in the cloud (up to 5GB) and synch this with Windows clients (Mac support coming soon). There is a small client app that installs placing a shiny blue folder on your desktop and it trickles the data to and fro. If you have over 5GB of data, it just replicates the excessive data only to the connected clients. And so far it's been stellar.
I'm going to use this to act as a backup for my wife's important directories so she (read: me) won't have to worry about losing her files.
I have to give credit to Paul Thurrott who mentioned how much he liked Mesh on his podcast.