I'm sure you're tired of hearing me talk about twitter as an innovative and easy tool for outreach and engagement. So listen instead to Amy Gahran and her conversation with the Mars Phoenix rover - via twitter:
This is one of the smartest uses of Twitter for public outreach I’ve ever seen — giving folks a sense of a personal connection to this high-tech mission to find water (and signs of life) on Mars. (Some members of the Phoenix team are also blogging.) I especially like that Mars Phoenix is replying to questions sent in by its Twitter friends (like me).
Makes it all seem so much less… alien!