we also need a way to see when/if people have responded to our ideas and our comments.  you can see responses to your own ideas if you click on your profile, but you can't see if there are new ones, and you can't see if people are responding to your own thoughts. 

Ideally there would be a way to 'cite'/'quote' another comment/idea so people can follow the connections.  i.e. i'm not responding to earlier responses; i'm responding to the original question, and it would be good if i could connect this post with that question.  right now, the only way you can tell who is talking to who is by counting the number of 're:'s in the title.

this allows new ways of ordering/sorting/linking things, rather than just in chronological order.  it allows users to link relevant ideas themselves.