Google Voice Search for Desktop is good but it can be improved and that’s the idea behind The Verbalizer from Breakfast which is an open-source development board designed to help even those who aren’t extremely technical to build their own voice powered features into Google’s new service.
The video below will give you a good idea of how it works and the project reminds me a great deal of the early eighties when I first witnessed a TI PC which had TTS built-in.