I don't read the Washington Post's On Faith bloggish-type-thing as often as I'd like. It's just a bit too much content for me to tackle right now. It does strike me as though Al Mohler, Cal Thomas, and perhaps even a couple other evangelicals are consistently taking advantage of an opportunity to proclaim the gospel and to apply it to everyday issues of American life and culture. In this most recent conversation, for example, Al Mohler clearly presents the certainty of judgment and several crucial elements of the gospel. Chuck Colson even calls for repentance and faith. This strikes me as about the closest thing imaginable in contemporary culture to Paul's address to the Athenians in the Areopagus, recorded for us in Acts 17.
We probably can't conclude too much from the volume of contents, but when I've checked in it seems as though Mohler consistently receives far more comments than any other author. At this writing, he has more than twice as many as anyone else regarding his perspective on the Virginia Tech shootings, with an atheist author coming in second. That doesn't mean he's convincing anyone, but it does mean that at the very least 192 people are being exposed to some biblical thinking about life, death, judgment, and eternity. So enjoy it if you have the time. Perhaps it's worth passing on to a non-Christian you've been working to evangelize.