Intel have published their preliminary specifications for the 3rd-gen of the Classmate PC which should drop into the $300-$450 range and appear before the end of the year. Tablet features appear in the specifications along with a standard netbook processing platform based on Atom. I’ve snipped a copy of the info from the PDF. Click the image on the right to enlarge.
The information, along with more detailed information about the 2nd-gen platform, is in the public PDF entitled CHLS002 on this Intel web page.