HotelMost attendees (speakers and students) will stay at the Holiday Inn University Center.
VenueThe summer school will be held at Carnegie Mellon University. Most of the events will take place in the Gates Center for Computer Science (GHC, building 9A on the campus map): talks will be held in the Rashid Auditorium on the 4th floor, and breaks will take place in room 4303. Lunches will be served in room 3305 of the nearby Newell-Simon Hall (NSH, building 9A on the campus map). To reach the Gates Center from the Holiday Inn hotel, just walk on Forbes Avenue until you see the building on your right (it's a 15 minute walk).
Directions from the airport to the hotelTaxi: Should take around 30 minutes and cost $40-$50.
Shuttle: SuperShuttle can take you to Pittsburgh hotels, including the Holiday Inn.
Bus: The 28X bus leaves from the baggage claim area and stops very close to the hotel. The trip takes around 50 minutes, and costs $3.25. See this website for more information.
Other useful linksBest attractions in Pittsburgh (roughly sorted by distance from venue): Carnegie Museum of Natural History (walking distance), Phipps Conservatory (walking distance), Cathedral of Learning (walking distance), The Warhol (take taxi), Duqusene Incline (take taxi), Carnegie Science Center (take taxi), National Aviary (take taxi), Pittsburgh Zoo (take taxi), Kennywood Amusement Park (take taxi), Fallingwater (80 minute drive but worth the trip if you have time).
The SPAA 2012 local information page has pointers to some great attractions within walking distance of CMU and the hotel.