My Litespeed Saber (55) weighs in under 15lbs. Some things that got the weight down are:
FSA Carbon Pro cranks (53-39)
Alien post
Modified Dia compe brake levers. I cut off about 2 inches off the ends. I think Nytro markets thier own light brake levers. Looks like modified Dia comps also. Also cut off about 2in off syntace bar ends.
I also ran Falcon Accell II disc. Weighs in at under 700 grams!