I've posted the CurlGraph Nitro sample application. Its described in the
Curl Nitro Sample Application: CurlGraph
article in our Widgets/Gadgets/Curlets section.
It visualizes part of the facebook social graph. We used it as a demo at the Web 2.0 Expo this April. The application installs an entry on your Start menu and can also install a desktop icon so you can easily start it up. It can run online or offline and it runs in safe mode inside the Curl sandbox, so you don't have to give it full access to your machine.
The full source code for the application is attached, so you can extend it further.
