I've been saying this for a while this morning, but I think Yoomoot has very good design objectives. I think what would be really interesting for me -- would simply be to discuss in an open way the fundamental issue of "How can we design a fast, simple user interface designed for large-scale many-to-many conversations?"
My guess would be -- that a lot of what Yoomoot is doing here (maybe all of it) would be appropriate for addressing that design problem. I seem to be interested in pursuing this with Yoomoot, because I am looking at the same kinds of questions, and exploring similar kinds of answers (design solutions).
On a somewhat related project I have been creating, I think what I want to do is "build an alliance of orgasnizations and users" -- that is based on a "fast click" approach to selecting bullet points, building connectivity between comments or facets or bullets simply as a comma-delimited list of comment/bullet database id numbers. So far, that technique seems to work very well, using MS SQL Server as the underlying database and ColdFusion (from Adobe) as the web programming language.
I like the idea of a short headline or title -- Twitter's limit is 140 characters, I think Yoomoot's is shorter. In SQL Server, I can adjust that length, and at the moment, I tend to offer more space. Maybe what we need is a very fast way to click through or select these "headings" -- and offer a way to add more detail by way of explanation -- kind of like this space I am writing into right now...