That's a great question; I want one of them too. I'll try to remember to ask somebody tonight at their talks. But last I heard, the barrier was finding a reasonably priced way to do it. I don't think they've given up, though; a year or so ago somebody showed me prototypes in a few different materials.
I'd love to know when they do manage to produce them for say $1000 rather than $10000 - they should have a waiting list so that they can inform people who're interested if they ever do manage to produce them.
Ok! It looks like you discovered the thing I found out last night: You get one if you become a lifetime member, at $10k.
They are definitely looking for ways to bring down the cost. I'll suggest to them that they start a waiting list. In the meantime, I'd suggest you follow the Long Now blog or the Rosetta Project blog. You can be sure that they will mention a 10x drop in cost on both of those.
