The Microsoft Speech team just announced the introduction of a new Windows Speech Recognition Macros tool (WSRMacros) which lets you create macros that are triggered by spoken commands. Macros can record a series of actions on your computer, which can be as simple as entering in your mailing address, or as complex as to allow you to interact with various applications via speech.
The tool is currently in "pre-beta" (hey, isn't that alpha?), and they want to hear your feedback about it at firstname.lastname@example.org. You can learn more about how to create a macro by reading the instructions in these release notes and you can follow all the news from the team on their blog.
Who wants to bet that someone is recording a macro right now that involves them saying "Computer, Show Map On Screen," or "Computer, Tea, Earl Grey. Hot." ...Oh right, that's me.