Here is a new french language Paris transit system mashup that will help folks navigate this great world city as well as the surrounding suburbs (Région Ile de France).
It's is a fully functional Google Maps transit planning tool that features actual bus, metro and train schedules recognizing start and end points when you type the addresses manually or when you click on the map itself. When you tap on the map between your start and end points it actually maps your walking route and to and from the start and destination stops!
The creators of this first mashup are also testing another one which takes into account the nationwide train network..
More info on these mashups can be found in this blog post. For more transit and rail mashups for other world cities, check here.
Other France Google Maps Mashups -
Part 1 | Part 2 | Part 3 | Part 4