Based on the Diamondville platform that combines Atom with the 945 chipset and GMA950 graphics (a very similar silicon setup to the McCaslin setup we see in the HTC Shift and Q1 Ultra) the Nettop architecture aims to reduce the bill of materials (BOM) for the next generation of sub-$300 desktop PCs. (Click on image, right, for details.)
In the PDF presentation at the Intel IDF content catalogue though, you’ll find an interesting snippet of info relating to the Launch of Atom.
So the launch, as I suspected, has slipped a few months and we won’t see availability on the first MIDS until June, after Computex. Possibly later.
The PDF also shows three processor variants for Diamondville: Intel Atom, Intel Celeron 220 and Celeron 440. The latter two being Intel Core processors.
If you want to know more about nettops, take a look at the PDF. (BPCS001 on this page)