I’m a huge fan of Rob Bell. I’ve heard him speak at Youth Speacialties, on his tour, and I think I have most of the Nooma videos. I also find young people respond very well to him.
I podcast the sermons from his church and several years ago he preached a phenomenal sermon entitled The Cross- Love Wins. The sermon was a great contrast of the Theology of the Cross vs. Theology of Glory. I found the sermon posted online at Mudpuppy. Give it a listen.