Values you place into the magic pocket get automatically synced across
clients and the server and are available to all of them. If you run your
example and then open the console in Chrome, for instance, you would be
able to type "now.foo" and see that it has the value "bar".
You can place variables in only one client's this.now pocket if you want,
but really if you want to have values that are only known to the server you
should keep them in a different server variable outside of the now magic
Hope that helps!
Owner Useful IO LLC