I too wonder about the long-term value of Twitter. I follow more than a handful of "tweeters" and have found that there is a lot of static that has to be sorted through for a worthwhile gem. Security is definitely an issue with this medium. A Social Engineering effort applied to these "tweets" can surprisingly reveal quite a bit of information.

Ideas such as the one that you presented regarding Powershell sounds interesting and demonstrate that there are some uses beyond telling the world about the latest event in one's life. Hopefully as this product evolves and matures it will become more valuable.