Microsoft Research is looking at ways for you can talk to toast (voice enabling notifications) with SpeechToast

SpeechToast: Augmenting Notifications with Speech Input Focus

"To explore the value of speech input focus for handling notifications, we built and deployed SpeechToast, an Outlook Add-in that replaces standard email notifications with a version that includes speech input commands (e.g. “open”, “delete”). Notifications shown by SpeechToast have speech input focus when the audio context surrounding the computer is favorable for speech recognition. We deployed SpeechToast to 18 current users of email notifications for 4 weeks. Overall, speech input focus appealed to some participants, while non-users indicated their willingness to have it enabled as long as it did not detract from their experience. ..."

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Nothing we can download or look at ourselves yet, but I still find it interesting all the stuff Microsoft Research looks into and plays with (err... I mean... um... researches... yeah... that)