That's a good idea, I have a small sub (only 20k subs) and I kept it dark till yesterday. I don't want to give Reddit the satisfaction of taking it, but putting sticky posts for kbin/lemmy seems like the way to go. I think I'll post a user guide, too.
On that subject, kbin reminds me of the Reddit I migrated to after Digg killed itself. It's a bit trickier for novices to navigate, but the interface is starting to grow on me, and I suspect that will be the case for many.