Yay!
I have posted a reply already to something in the old thread, and it permitted it. So what makes sense...post all new threads here on the combined board, but let active topics in the old threads wind down on their original board?
There aren't that many hot, ongoing topics at the moment so hopefully it's a moot point soon. But it seems clumsy to start a new thread in this new board to reply to something posted in the old board.