AM,
The article is posted to Phil papers.  Here's the link: http://philpapers.org/rec/SCHHIL

It is called "How I learned to stop worrying and love the inverted spectrum"  
It is in Pacific Philosophical Quarterly 90 (1): 98-115 (2009)

I gave it that title because it is written from the perspective of a logical positivist, Carnap, and it is written in Carnap's voice.  Odd as it might sound the logical positivists would have supported the view that the inverted spectrum is possible if they had thought about it.  Dennett does too for similar reasons.