Oh, I am wrong! (Kinda)

In reference to the standard bike (~$750):

The current 2011 and earlier models were not track compatible (still a valid comment)

The newer 2012 model has much, much different geometry. It looks to me to be track compatible, if a little less aggressive than the "pro" version. Shoot, it even has a real track crank for the first time ever! (BCD 144, 48T). I'm shocked (pleasantly)

Don't think of taking a 2011 or earlier Langster to the track. But if you can get the 2012 model, they look like they will work.

Will wonders never cease...