The new hotel reservation service is being bundled with Priceline’s free Hotel & Rental Car Negotiator app for iPhone and iPod Touch. Deals will be available at 11:00 a.m. local time with users having the ability to books rooms for a maximum of 4 nights up until 11:00 p.m. local time, or until rooms sell out. “Usage trends show that approximately 70% of priceline.com’s mobile customers are booking hotels for same-day check-in, so there’s a clear market need for the Tonight-Only Deals service,” said John Caine, priceline.com’s Senior Vice President, Marketing. The Tonight-Only Deals will display all available hotels along with description, photos, maps, available discounts and reviews from past guests. The new service is currently available in Atlanta, Boston, Chicago, Dallas, Denver, Ft. Lauderdale, Honolulu, Houston, Las Vegas, Los Angeles, Miami, New Orleans, New York, Phoenix, Portland, San Antonio, San Diego, San Francisco, Santa Fe and Washington, DC with more cities will be added.