superkalifragi recently posted a link to an interesting documentary from the BBC about the state of love and romance in Japan. I highly recommend checking it out, it haz mentions of yaoi and very realistic blow-up dolls.
One of the few blogs I read has been weighing in on this topic lately too, and he always has interesting stuff to say. Originally Gaijin Smash, you can now find him at Gaijin Chronicles. This guy is hilarious and gives some good insight into what living in Japan is like for a foreigner.