My ds also only has the morning feed, and gave up his night one voluntarily about 3 months ago. I am a bit concerned about the comment made earlier (by someone's hv?) that b/f'ing them longer than 1 year was tantamount to 'abuse' on the part of the mother. I have never forced my ds to feed, and, although I felt a bit sad about him dropping the feed at night, I accepted it as part of him growing up.
This is surely a healthy view of b/f'ing? I would hate to think that anybody would think it unnatural to feed past this stage if the baby wants it.
I must admit that, before we had ds, my dh and I were surprised that my sil was still feeding her ds in the morning after a year, but this was merely ignorance. She was embarrassed at the time, obviously because other people had said that she should stop, and I now feel awful for adding to her embarrassment.
Personally, I think that I will stop when ds is walking and talking, because it would feel like he is no longer a baby. However, this is only how I want to be, not how I expect anyone else to be.