[css3-background] blending on 'box-shadow' and 'text-shadow'

All,

I'm currently working on the blending specification (
http://blogs.adobe.com/webplatform/2012/04/04/bringing-blending-to-the-web/)
and someone brought up that a very common use case for blending is drop
shadows.
Some of our applications such as Photoshop, Illustrator and InDesign set
the shadow to multiply by default since it provides a more pleasing
appearance that can't be done with simple alpha blending. See
http://css-tricks.com/dont-use-black-for-shadows/ for a discussion on why
this is.

Would there be interest in an additional keyword to specify blending to
'box-shadow' or 'text-shadow'?
the syntax could look like:

box-shadow: 64px 64px 12px 40px rgba(0,0,0,0.4) multiply


Rik