The Hackathon and User Summit are hosted at Qualcomm's campus in San Diego in Building AQ.
See below the full address of the location:
10145 Pacific Heights Blvd San Diego, CA 92121 USA
TBD
You can call and ask for the Qualcomm rate at the Country Inn & Suites San Diego North
5975 Lusk Blvd San Diego, CA 92121 USA
See the map below where Building AQ is circled in blue and the parking garage is outlined in the green rectangle. 
Food and Drink
Lunch will be provided on the roof of the nearby Building AZ during the User Summit. Breakfast and refreshments will be available at the main user summit room.
Internet
Wifi will be available to all attendees.