Well, they said in the comments to the post, that comments made by an "inactive" journal will count, so I assume (and yes, I asked for clarification) that any posts to communities count as well.

This seems like a pretty thought out thing, and I'm not worried (based on the entry and comments) that any actual content will get lost.

And sorry for the capslocks - I'm just tired of the misinformation that's still around.