Well, I got a response from Trek:
On 02/04/2011 you asked the following question at Trek
"Is it possible to have a Trek Dealer order this bike with the steering tube uncut? If so, how far above the head tube would it extend?"
Will from Trek HQ Waterloo, WI said:
"No, unfortunately the steer tubes come at the maximum recommended lengths for each size."
Valygrl - it's been in the mid-70's in the Sacramento "Valley" lately.