I've been Browsing CI a lot, and well the amount of times I've been reading peoples journals and wanted to reply to their specific journal entries is high, though usually ending putting it in their normal comments and it either gets missed or people ask "what are you talking about?" Its just an idea maybe to give consideration? It doesn't have to be threaded like the normal comments and at the bottom of the entry has a " __ Comments" you click it and they come up under the entry. This would help when people are stuck and you want to make a suggestion on something or ask how they done something they mention in the post and then leaves the normal "comments" open to people commenting on the costume in general.
Again its just an idea =)