So you begin here:
And you then get the standard airline search screen. But with a new "Price and Schedule" feature. Pick that ...
The results page uses DWR to fetch extra details on a flight.
I've said this before, but it bears repeating - DWR is fantastic as a way to add Ajax features to an existing website without re-writing the whole thing from scratch. Walmart is another great example of this.
It's one more step on the road to total world domination that I talked about with Marla Parker over at java.net.