I am been experimenting with Windows Live Mesh today.  Mesh is a new toy from Microsoft which encapsulates file sharing, file synchronization, and remote desktop access.  It's connected to your Microsoft Live account, so you can login from any computer to access files which you have shared.

I created a "synchronized" folder on my desktop and copied a few files into it.  In the background, Live Mesh synchronized these files onto it's server (be careful about sensitive materials).  I was then able to access these files from my Live Mesh Desktop, which is a virtual desktop not tied to any real computer.  This virtual desktop can be accessed from within Internet Explorer.

You can add any number of devices to your "Mesh".  I've got my work laptop connected and tonight I'll try connecting my home computer.  Currently, only PCs and laptops are supported, but Mac and Windows Mobile devices will be supported in the future.

Another interesting feature is the ability to share folders between people.  So my shared folder could be shared between all my devices, as well as my wife's laptop via her own Windows Live account.

It's currently in the "technology preview" stage, which is enough for early adopters to play with, but may not be ready for prime time.