I like how the high/low forums are organized - one thread per prefix. It makes finding info easy.
But what's not so easy is when there's a signature or print year change in the middle of a prefix. Then it's not so easy to find the info. Take HNN, for example. I just searched through the five pages of HNNs and there's so much narrowing down of the signature change it makes my head spin!
So instead of just one HNN thread, I suggest that there be one HNN-K/D and one HNN-J/D thread. That would make seeking out info sooo much easier. Probably too late now for HNN since the thread is so big (and they're largely gone from circ anyway.) But once we start seeing 2007 print year notes, or a future sig change (rumours of one soon, anyone?) any relevant prefix threads could be split right away.
Just a suggestion.