A good mate of mine, Steve Kryger (@communic8jesus), runs the Communicate Jesus blog. In 2011 that blog just made it onto the top 200 Christian blogs, which is no small feat. At the moment, according to really only one source, Communicate Jesus is ranked 247th. It is even beating Ed Stetzer (he is at 261) and is only 4 places below The Briefing.
I once told Steve (a bit candidly) that if he updated his site to be responsive, then I would make him an app. While Communicate Jesus isn’t running a responsive theme, it is running a WordPress plugin called WPTouch that works as a mobile theme, depending on your device.