Justin Thorp has a fascinating post about Twittertale, a diverting Web application that allows you to see who has the biggest potty mouth on Twitter.
It is not difficult to see that Twitterdale could be tweaked to measure who is talking the most about your client, or your client's industry. This could be a valuable tool communications professionals. This is a small example of the sort of tool that comes out of the serendipity of social media.
Perhaps cracking down on perceived Internet abuse is not a good idea.