Considering how comments are managed, i'd say that fb is not the best place for conversations. But it's undeniable that it will be a good tool for announcement

Considering how comments are managed, i'd say that fb is not the best place for conversations. But it's undeniable that it will be a good tool for announcements/etc... , allowing to reach a big share of the HN audience quite easily. Not a member yet, could reconsider it in the future.