Dot net solutions have just released a Wikipedia explorer created in WPF. This is a great little application, which uses excellent 3D effects (as saw on Channel 9 a few months ago) and has a great network node feature which builds relationships based on their algorithm.
I was really impressed when I saw the 3D effects on Channel 9 and its great to have a play. Sure this could be really useful in the right kind of application.
More information here:
Nice work guys!