LG showcased its latest mobile phone, GD900, that has a glass keypad that it fully functional and may add as a mousepad for navigation purpose. Seems that that glass piece is a multi-touch panel that supports gestures.
This GD900 is just 13.4mm thick, has a 3-inch screen and running on Windows Mobile with their S-Class UI (I am not very sure about this UI). Below is another picture showing (maybe) gestures. It will be available in Europe and Asia in May.