Steen:
greatdoes it function as a complete OS? so now you can send multiple programs to it?
You can have several programs loaded (I think, 99% sure), and of course lots of functions to call from a shell-like environment which would be perceived as "programs" in a way, but I'm not sure you can (easily) add software later on without making a new sketch with the OS and your new programs on it. Also, having only 1-2k of writeable memory leaves not-very-much for adding stuff later.