Expedia.com is already a good place to find deals on hotels and now, until July 7, 2013, you can use Code EXP15B to get an additonal 15% off your hotel booking.  Read the terms and conditions – some chains are excluded, but it’s worth a try.
Book a hotel on Expedia and save 15% on your stay! Use code EXP15B. Please see the Terms and Conditions for details. – Expires 7/7.