I'm really impressed that the layout works so well, even on the tiny iPhone display. The list on the right panel of changing threads is making it easy to keep up with all the current activity... I'd like a switch to show just the threads in which I've posted though.
It works well for me, including on the iPhone, but it does look a bit unbalanced. So far, the poll results are pretty evenly split.
I'd like to try another solution that I hope will work pretty well for everyone. There is a new "Active" tab which shows all the active threads. This way, everything is left uncluttered, but the latest active discussions from all forums are a click away.
That's one extra click for Brian and me, but more than half the votes suggest that the "Recent Discussions" aren't wanted on the individual thread pages.