As he says himself "Why not?"
Armstrong posted the picture of the T1 Track bike on TwitPic yesterday to more than a little comment. If you want one like Lance's though, you'll have to head over to the States, the T1 isn't available in Blighty. No doubt about it the bike is nice… not so sure about the shoes (below) Lance was showing off on Twitter though, on the other hand you could probably forgive a few yellow stars when the shoe weighs 195g. Nice box too.