wxSmithDemo is an application that I use as a testbed for new controls. It is released as a sample demonstrating the usage of the new controls. You will need to build it yourself from source. You can check out the source from SVN at:
The application is a work-in-progress and will improve with time. It provides a starting point for using the additional controls from within wxSmith and provides some useful pointers intended to help you get going with using the controls in your own applications. The code is commented to provide caveats and information where it is thought useful.