Me! I miss them too!
So how can we bring them back, if the case is that whichever forum god/mod was doing them just didn't have the time/interest/energy? Should we brainstorm ideas and form them into some polls for the first few challenges and then discuss the finite details? Maybe appoint a couple-three volunteers to each challenge to set it up for public involvement? I mean, PS tennis activities and interactive threads both on MR and elsewhere on the web can sometimes get to hundreds of participants, so we should be aware that there might be a large amount of response...
Thanks for this thread btw!