I also think that if you're looking for small (as in small screen and not just thin) and very light, you would be better off getting an inexpensive netbook and hacking OS X onto it. Solutions are getting more simple and now there's even the USB dongle option
EFiX. While not dirt cheap it appears to be so simple anybody could use it.
The MBA is geared at a different audience than the netbook and EeePC crowd. There's no reason to buy an expensive MBA when it doesn't really suit you.
Obviously this situation might change when Apple updates the portable lineup (probably soon), but I wouldn't count on an inexpensive and tiny netbook from them. A somewhat cheaper MB and possibly feature-enhanced MBA is the most I'd expect at this point. Their notebook business is doing very well. Their market share growth rates are better than most (or all?) competitors. They're not under a whole lot of pressure to change here.