There are many ways to travel to Paris, though probably the most common for ISI 07 participants will be Charles de Gaulle airport:

Charles De Gaulle Airport

Or:

Paris Airports

For travel within the city, there are extensive metro, bus, and train services in and around Paris:

Paris Metro Travel

Airport Access Information

A map of the campus of the American University of Paris can be found at:

The American University of Paris Campus Map

The ISI 07 meetings will be held in the Grand Salon, Building #1 on the campus map (31 Avenue Bosquet on the second floor).