Good idea, but instead of executing commands directly, I would instead suggest a more generic approach/improvement.
Create a new DCE command like "Send Notification". This command would be sent to some (new) device/plugin that can be configured to send notifications using several means. One option could be gtalk, another could be email. This way, you have a common method to send notifications as a result of events, and you don't have to go through all events if you decide to change from gtalk later on. You would just change from gtalk to email in the configuration of the notification device/plugin.
On the other hand, I don't see any problem with experimenting with different ways to send notification, that will be required no matter what route we go.