Is it possible to use the Ubuntu Server Cloud as a storage solution for all of my Ubuntu installations. As in, the same way the Ubuntu One service works, where it is synced with all of my computers if I choose that as an
As I understand you need a clustered file system which is available to all machines in a Linux based infrastructure.
I suggest you to have a look at Lustre. This is almost exactly what you are looking for except that it does not sync the data locally.