Thrice the Tim Keller.

Steve McCoy's Reformissionary blog points us to three talks by Tim Keller at the recent Reform & Resurge Conference:

Being The Church In Our Culture [audio] [video]
Preaching The Gospel [audio] [video]
Doing Justice [audio] [video]

I like how this pic (falsely) implies that Keller just got finished shredding on that guitar.

Note that these are talks, rather than sermons-- if you're interested in more Keller resources, Steve has a gold mine here.