I assume we're all somewhat familiar with Pope John Paul II's "theology of the body" (expressed in his Wednesday papal audiences in the early 1980s). Christopher West, a (Catholic) speaker and writer, is perhaps its most enthusiastic and famous proponent. In early 2009, a controversy about his interpretation of JPII's theology erupted after some comments he made on TV. Although his comments were taken out of context and probably misinterpreted, it turns out that he has been making some pretty serious theological errors all along. Dawn Eden, another Catholic speaker and writer, recently exposed these errors and dissected West's interpretation for her master's thesis in theology. Find a summary of it here.
UPDATE: Marcel at Aggie Catholics has responded to Dawn Eden here (thank you, dear commenters, for the link). I need to read more of both JPII and West for myself before I can legitimately weigh in on the questions at hand. That said, I (like Marcel) am inclined to retain my reservations about West, though I will no longer take the entirety of Eden's criticism at face value.
Open question for those who know more West's work better than I do: Does he speak or write at all about the celibacy of priests and religious? More specifically, if "sexual love is the earthly key that enables us to enter into heaven's song," as West writes, then how is it possible that so many saints have been celibate? Perhaps West overemphasizes the (true) image of God as the Divine Lover at the cost of undermining other (also true) ways He reveals Himself to us: as Father, Savior, Good Shepherd, the Way, the Truth, the Life...
Anyway, on a related issue, here is a good reflection from Peter Kreeft on sex in Heaven.