"I have read some posts on roadbikereview.com, which references to this website, that an aero seatpost does not provide an advantage, in fact can be disadvantageous. However, what about aero forks? "

John Cobb claims that the aero posts don't work. He tested them in the wind tunnel and they worked great on a bike without a rider but with the rider it was something about the tubulance between the legs. He felt they are actually slower. Jim Martin and John Cobb have tested various forks and feel that an aero fork will be about thirty seconds or so over 40 kms than a standard oval shaped fork. Aero wheels will save about a minute to a minute and a half over this distance according to Cobb and Martin.

You'll probably get the biggest gain on your Bianchi by getting a pair of the "big slam" or identical Profile Jammer GT aero bars and learning about the big slam position.

to add to the info you can find more about the "big slam" position in the technical articles on this site
once John gets it back and running.
http://www.bicyclesports.com/