Reasons why I don't think there will be a flash disk in this notebook? Well, 128gb costs $5000 right now, so doubt they can offer that.. The only thing I could see here is some innovative optical drive built in and nand flash to make it boot faster..
I too think this thing must have a flash/mechanical hd combo to be a viable computer (as opposed to a glorified iPhone/PDA). Anything less than 160 GB is absurd these days.