The headline at Wired...

U.S. Spies Buy Stake in Firm That Monitors Blogs, Tweets

...is better. The version here ("U.S. spies buy stake in Twitter, blog-monitoring firm") makes it sound like In-Q-Tel invested in Twitter itself.

Yeah, this headline needs another hyphen: "Twitter-, blog-monitoring"

We're in this field as well and the number of people who have suggested we sell/licence our tech to government and police agencies is pretty surprising. I'm not down with that, ethically, but there's definitely a need for people who are.