Dyna Techs only got down to the neighbourhood of 25lbs when they went Ti. My Quantum was 27.5lbs with Mag 20's (one of the many reasons it went rigid!) and 24lbs with some trick bits and rigid forks.
A sensible build should see it down in the 25-27 lb region though. Not really the point though, the fact that they are so bomb proof means a lot more to me!
Well i weighed the bike as it stands at the moment and it weighs 23.6lbs
the only things missing are the rear mech and the chain so think it should not wiegh more than 24lbs once i add these components and then change a few things such as the bar , stem and seatpost which are steel at present.
also might go with some different tires too the ritchey magabite is a bit chunky might go for some porc's white if i can find some cheap enough.