Ray Ozzie (of Groove) has a blog posting about the new Homeland Security Information Network of which Groove will play an integral part.  The Groove press release is here.   

I think this is a really exciting announcement as it demonstrates a very compelling legitimate use of P2P.  Too often P2P is portrayed in the media as being purely about trading illegal MP3s, but hopefully uses like this will become more widely associated with the technology in the future.