Thanks, borg. My two cents, having a common membership table would be a huge help to anyone who plans to portal with multiple forums.
I was able to delete the extra fields in the first forum and successfully copy data to the new forum, which saved me from typing all my topics and forums over. The threads I don't want anyway. I did run into some permissions issues and had to reapply them group by group, but that is most likely from monkeying around with the SQL data.
I think it would be a lot smoother going from v8 to v8, which is how I will try it when I am ready to create another new forum. It may even make sense to create a set of template tables in SQL and use the export function to kick off a new forum in the future, something I will think about trying maybe. To be successful I need to be have the key fields retain their source data, and I'm not sure that is possible.
Oh well, I probably spent as much time trying this as it would have taken me to just type the darn things over again!
I really like the permissions grid, my only suggestion would be if its possible add a button that allows you to select and deselect an entire column or row at a time.