If you live in the US and want to give Windows Live Mesh a go, you can join in the fun without an invite, according to an announcement in the Live Mesh Forums. Live Mesh, at the moment, is a sycning solution that allows you to sync data across multiple platforms. Intenational users can also get in on this, if they are willing to change their Windows operating system region and language settings to EN-US.
I’ve been using Live Mesh for awhile now across multiple devices and multiple platforms (using the web option on a Mac) and it has worked very successfully for me so far as a syncing option. That said, I think there is greater promise with Windows Live Mesh than what we currently see offered, once it gets its groove on, and I’m hoping that this comes to be.