There are parts of the Parrot AR.Drone that are rather underdocumented, and one of those is getting the navigation data. Once you activate the nav data, it doesn't send the data directly to you. Instead, it sends it to the 188.8.131.52 muticast address.
Which is great and all. That means you can have one person controlling on their laptop and a bunch of other people watching the nav data on their own systems. But it'd be nice if their docs told you this.
There's also a way to get it to unicast to your address, but they certainly don't lay that out.
Anyway, the good news is, I can receive the AR.Drone's nav data now, which is a big milestone for the 0.2 release.