Yesterday I bought Asus Eee PC (4GB) for 299 €. I must say that this is small, way too small. I don't know yet how usable, but I am excited. What I found very interesting, is the fact that this can do all linux tricks nicely. Adblock for Firefox and GPG for email encryption is there.
I bet microsoft is scared at the moment. Their Vista is far from this experience, where users want computers to act like instant on devices. Linux serves just so nicely of that purpose here.