Since the U1 uses a 1.06 ghz ULV Core Duo processor, we should be seeing this chip in a Vaio TX or new iteration any time now.
Your right, I also like to have an optical drive with me, even though I rarely use it whilst traveling with it. It would be nice if the Asus U1 could dock with the optical drive on the bottom or something like that. Have it on when you need it and take it off when ya don’t, flexibility!!!!