Kat, I guess it would make it easier to scan quickly, as an index, but I enjoy reading people's comments in the thread as it grows. It adds to the connectedness I feel in communicating with other people who also remember these old discussions. I would not like to see the links posted by different people and their comments deleted. The beauty of many of these threads is the commentary that builds around the information, and seeing the way different people participate in the search, not just the facts of the source.
Alice