Venice Open Data - View Vaporetto Routes in Real Time
One of the first applications of the data published by ACTV - the Venetian public transport company - is this map by e-terna.net which shows the positions of the public transport boats in Venice in real time:
http://battelli.e-terna.net/
It is just a basic idea to show the sort of thing which can be achieved using the data sets - but it looks like it could be very useful.
Do you have any other examples which use the Venetian data sets?