Two people who have had a powerful influence on me over the last 2 years are Shane Claiborne and Greg Boyd. I love their writing, I love their teaching and I love that they are laying it all on the line to get their message (the gospel of the kingdom) across. Two months ago, on Greg Boyd's blog, he shared that he had been a panelist at the National Pastor's Convention, alongside Chuck Colson and Shane Claiborne. That interview / debate was finally released and I highly recommend that you set aside an hour or so and watch the video of this discussion.
Personally, I thought Boyd and Claiborne were brilliant! I really hope you'll take some time to watch this video.