From reading Joe's message above, it seems he is implying that the cylinder is made entirely of a ceramic based compound, including the cylinder bore. His blog also mentions that the ceramic cylinders are "lighter than the aluminum cylinders with iron bore".
However, looking at the pictures on his ebay adds make it look like an aluminum cylinder with a ceramic heat coating.
In this photo from one of his ebay listings, you can see what appears to be the outline of a cylinder liner on the deck.
View attachment 53517
Does anyone have one of these cylinders to verify if it is indeed a full ceramic, or just a ceramic coating?