The "greeting" for that forum states "Ideas for events, panels, crafting items, programming, gaming, etc. Email
forums@arisia.org with your username to get posting rights to brainstorm forums.". We never saw your email to
forums@arisia.org. I have gone ahead and given you permission to brainstorm. Note that brainstorming is already closed for Arisia 2015. But, please check that you now have access.