A vision of how the user should experience a netbook.
The implementation for that vision contains many pieces; the most visible one is the desktop environment. But experience is a lot more than just the desktop environment; it includes network connectivity, power, performance, boot, etc.
The Moblin project publishes a Linux distribution that works towards this vision; other OS vendors work with the Moblin project towards a similar vision and sometimes have "Moblin" as part of their product name.
Not all of these manage to implement the vision to the same degree unfortunately, but hopefully that is just a matter of time.
I realize that this is sometimes confusion, and our grumpy editor got confused a little bit as well; just adding more to the general confusion.
The only thing that tries to keep the Moblin ideas "whole" is the trademark (including compliance); but that is a fine balance. One the one hand, there are requirements on when/how you can use the trademark (don't ask me, I'm not the guardian of that), on the other hand the open source community frowns on enforcing trademarks like this in general....