It's been a while since I last bumped into a nice visualization project like this one.
It offers an advanced interface for exploring Genealogical graphs.
I personally like how nodes are hidden/shown in demand, how the subtree widget is implemented and how you can easily switch between different layouts.
You can access a live example here. I think its better rendered with Firefox, Safari, Opera and Chrome 2 (version 1.0.x has a bug).
The left menu offers some navigation options to choose a band as starting point. You can also find details about the focused band under the Details toggler.
Here's a short video of what you should be able to see: