Sony is starting to ship samples of their new tactile input device called Touch Engine Module, which can be used to make touch panels, etc. vibrate in responce to a touch.

[Touch Engine]

Touch Engine uses piezoelectric vibrators that can be operated using a low voltage electric power source. Therefore, it could be easily integrated with mobile devices such as digital still cameras, PDAs, etc. (It is already used for SONY UCP-8060, a professional controller device for broadcast stations.) Touch Engine is based on the technology developed at Sony Computer Science Lab.

via Sony Press Relase. Thanks Ivan.