Bus: You can
take a dedicated bus to Florence in 2009.
Railway:
This airport has a railwaystation just in front of it. They are
connecetd by a 40 meter covered walkway. So this is really convenient.
It seems that in 2009 there is a train every 30 minutes to nearbuy Pisa
railway station. This airport also has direct railservice to the city
of Florence. But in 2009 there seem to be only 5 trains a day, so this
isn't convenient.