Time has a thought-provoking interview with Bishop N T Wright about heaven. Ironically, I always associate Wright with being more conservative and traditional. My first exposure to his writing came over a decade ago when he was popularly known as a critic of the Jesus Seminar. He is hardly a left-wing agnostic.
Basically, he says that the popular Christian notion of heaven is mistaken. It is not a place of disembodied existence we go to after we die. The Bible describes a "life after life after death" of Jesus returning and restoring Creation - a merging of heaven and earth as described in the Book of Revelation. This has profound implications about how we live our lives now.
Check it out.