A friend's father actually got one for Christmas. The reason for the premium price is because it is a "limited edition" and it comes with a signed certificate. The bike is clearly for people who:
A: have more money than they know what to do with; and
B: want to share in the magic surrounding Armstrong's story...on and off the bike.
To these people, I say more power to them. They are doing what they want and not hurting anyone else in the process.

Buying the bike was actually a pretty funny story. My friend is not into biking at all but his father (a CEO type) is. So I went to lunch with my friend a few weeks back and he's telling me that his father had been looking at this "bike that Lance road in the tour" at his LBS that is $10,000.

The family bought it behind his back and apparently the father -- distraught that the bike had been bought from his LBS -- asked the bike store guys to immediately try and track down another 56cm for him. The LBS guys of course stalled because they knew who the original purchaser was.

I was kinda hoping they would of sold him a second one, so then he would of had two, and I could of taken one off of his hands at a steep discount, say maybe $2,000. (I can dream can't I).
Anyway, he got the bike for christmas and was pretty stoked. I still drool over the one in my LBS, it really is a beautiful bike.
A