The Pista is an awesome bike, I have the 2005 Pista too and took it for it's 2nd 30 mile ride yesterday afternoon, it's fast and very responsive.
I have a 17t cog I had installed and this bike is fast! I don't know the weight, but it's probably close to 20lbs.
I am buying a LeMond Poprad (Cyclocross bike) and you might be amazed to hear that the 55cm model I checked out at the bike shop is lighter than my 51cm Pista!
I ordered a 52cm Poprad, which is a fusion of True Temper OX DB steel and Reynolds 853.
I was amazed that the Poprad, with the double chainring, derailleurs, 2 sets of brakes and all the components and at 3 sizes larger than my Pista, was lighter.