I think it's fine that it stays open. I'm interested in joining the Prizm dev. scene myself, but there are other things I'm working on at the moment. I also think that it helps that Prizm hacking has it's own section for visibility sake. When new members join that are interested in programming for the Prizm it shows that we are interested in it here. Otherwise, they might not notice it and decide to look elsewhere for discussion. Just my two cents.