Well some games, like Mario Kart Wii, work without noticeable lag even across the world, while other games such as SSBB work better within the region. So the region approach is probably best, but there couldn't be any harm in mixing them up for lag-free games.

As has been pointed out, there is nothing stopping you from cross-posting your FC into the different threads if you're up for inter-region matches.

Are users allowed to make new threads for new games, or can only Mods make them?

_{Sorry, Im sorta clueless...}

Anyone can make a thread so long as it isn't a duplicate and the thread title follows naming conventions. Go for it!

I think separate regions for games are unnecessary, it is probably better that when a user posts their friend code they specify their region or times they are available to play. I for example live in the UK but with my job I have a pretty irregular sleep pattern so often am playing at times that Americans are probably playing. Apart from that this forum is a excellent addition to the site.

We started the regional threads because we had noticed them appear in other sections of the forums. You're of course free to post your FC in the NA thread, or whatnot.