User blog comment:Toughpigs/Wikia's new Forum demo/@comment-265082-20120725233730/@comment-10370-20120725235153

There are two big differences between the Forum system and article/blog comments:
 * Article/blog comments are one big stream. Forum and Message Wall conversations use multiple threads.
 * Article/blog comments are in reverse chronological order, so conversations tend to go in circles rather than progress through a full conversation. Forum and Message Wall conversations are in chronological order, so you can have a beginning, middle and end to the conversation.