I think it's a great idea. I never visit MR because for me, the forum is swamped with flights I'm never going to use since I'm not in the US. With an 'international' section, the non-Americans might actually get more of a chance to use the forum.
Also, what makes a fare 'good' can be different in Europe, the land of high fuel surcharges from the US.
I would ask that American based TB members try to consider this both from their home based viewpoint, but also from the viewpoint of European/non-US members, who currently find the forum of much less value, so creating a self-fulfilling cycle of it being predominantly US based.