Last week I was able to get to the Urban Plant Life Consultation in London hosted by the London City Mission. The main speaker was Rev Dr Tim Keller of Redeemer Presbyterian Church in New York. Dr Keller has been instrumental in not only the planting of Redeemer but in the establishment of a church-planting movement in New York and beyond.
The mp3 recordings of his three lectures and a Q&A session from that day are now available and have been for a few days. From that page you can also catch up on the previous consultations that began in January.
I find Keller always worth listening to.