Just went online to the official site to see about booking tickets for the Uffizi, and see that starting in March they are changing the fee structure for the Uffizi, Pitti Palace, and Boboli Gardens.
They will be going to a two tier price system based on peak/non-peak months.
From March Through October:
Uffizi: 20 €
Pitti Palace: 16 €
Boboli Gardens: 10 €
From November through February:
Uffizi: 12 €
Pitti Palace: 10 €
Boboli Gardens: 6 €
And of course, this doesn't include the 4 € online booking fee per ticket.
They are also offering a combined ticket for all three venues good for three consecutive days (which I think is a new option). The web site also says that the combined ticket offers "priority admission", whatever that is (I don't think it is the same as just skipping the regular non-reserved ticket line because they don't mention this for the inidividusal tickets).
From March through October: 38 €
From November through February : 18 €