We'd have Amiga and Atari ST users invading on our turf.What if the new site was called "68kFriendly"!!!
It's not a bad idea. I just think that it should have been done years ago, and it's a little too late now. I say a little too late because we have already built up a community of 68k Macintosh users. It's called the 68k MLA forums. Creating another place would only end up with people dividing up their limited time among more places. So, in a very real sense, I think it would take away from the forums.
But maybe it is possible to make these forums more accessible to 68k Mac users. My understanding is that phpBB can be themed or skinned or whatever it's called in phpBB parlance. Maybe someone can take the time to make something or find something that is friendly for an old web browser on an old machine with a small screen.
If you want a temporary place to swap files, without chewing up space on a server, maybe implementing something like the zone on the English Amiga Board (http://eab.abime.net) would work.