So, the forward position is obtained via the optional seatpost. The stock T1 comes with the regular, non-adjustable seatpost which puts the seat tube at 73 degrees...which is normal for a track bike.
I am from Cervélo AND I am a T1 owner. The stock post is the single position post which gives you the 73 degree effective seat tube angle. The second position can be attained with the post that Hutch has pointed out or the two position post from your P2K. It can also be ordered through an authorized Cervélo retailer. We don't spec this post as it will put many saddles in an illegal position for UCI racing.
David Byer, Cervélo