I successfully signed up and started looking around. For 12+ nights I have planned for January I could not find a single place that was cheaper than what I have - but then I used IC F&F, IC BOGOs, ... quite heavily so it would be hard to beat/match those prices.
Based on the FAQ they have business travelers in mind (third parties, travel coordinators, group bookings, ...).
I've added them to the list of my websites to check when looking for deals for now and guess they might get a piece of my travel budget on US trips (the IC ORD sounds great).