creative commons through the looking glass

I'm over in Sapporo, Japan for the iSummit and a number of thoughts are going through my head. One I often have wondered about is why the Creative Commons sampling licences are not included as part of the standard licence generator. Surly you could have a system that incorporated the sampling options within the existing questions. Something like this:

Allow commercial uses of your work?
Yes
No

Allow modifications of your work?
Yes
Yes, as long as others share alike
Yes, but only sampling of the work
No

That way if someone answered yes to commercial and yes to sampling they would generate the sampling plus licence. If someone answered no to commercial and yes to sampling they would generate the noncommercial sampling plus.