Hey really cool idea you have got here.
It sounds a bit like your making an ibookair lol. Just wondering you said in your first post that you'd have a 4gig ssd just for the OS, however given that prices are falling all the time, would you not be better with 8gig or even 16gig? Would the os run better if it had a bit more space?

Have you started on this project, been a while since there was a post here and wondered how your getting on.