Nick Malnick and I programmed the first game to utilize the Glimmer engine. We did so by writing tests first and following the model-view-presenter pattern with data-binding.
It is a simple 2-player Tic Tac Toe game that I demonstrated during my talk at EclipseCon 2008:
I finally committed the completed version to SVN. For those interested in looking at the code, feel free to do so by clicking on these links:
Of course, a big part of the reason why I like Glimmer for building desktop applications is to have the ability to write very concise domain model code in Ruby. Check out the TicTacToeBoard and TicTacToeBox classes for examples of very readable and easy-to-maintain domain model code, especially in comparison to the often bloated setter/getter infested Java domain models.