At any given time, across any of our business groups, there are new ideas being investigated, tested, and incubated. It's in Microsoft's DNA to continually develop and incubate new technologies to foster productivity and creativity. The "Courier" project is an example of this type of effort and its technologies will be evaluated for use in future Microsoft offerings, but we have no plans to build such a device at this time.
Like many people, I didn't expect the Courier to actually make it to production, but this is still a shame. I doubt it would have ever found widespread use, but within its niche market (artists and journalists), it would have been indispensable.