A couple of answers
I removed who's online because of a bit of grousing about it, and intend to replace it with something that allows opting-out. I also removed the chatbox, and I hope to come up with a combo community chat/who's online/tweeter thingie to satisfy all three desires.
Ignore planetfall-1, that's the initial download of the theme and turned out to be for tikiwiki 2; we're running version 3, and plain old "planetfall" is the later version. I'll remove planetfall-1.