Usability 
Lodging.mobi is the latest in a number of new mobile hotel search and reservation sites to launch this year. Nice to see this long neglected area of the mobile web finally getting some attention. The well designed site has an inventory of over 75,000 hotels around the world. It uses browser detection and adaptation to deliver page and images sizes optimized for six different classes of device and should be usable on virtually any phone.
The user interface is straight forward with the search form leading directly to a list of available rooms sorted by price from lowest to highest. Prices listed are room rates only, taxes and fees are not included.
Making a reservation requires a credit card and filling out a long form. In this initial release it doesn't appear to be possible to store your credit card details for future use or complete a reservation over the phone. Source: Mobility.mobi
19-Feb-2013: "Temporarily closed for renovations"!