Another possibility, @Robin, is to make a more generic ability to tag. One popular thing I've seen for an internal social use case was to let anyone free form tag things - and then people would +1 tags they recognize/approve of. Yeah, it had a bit of gamification to it, but overall worked kinda nice. The search engine was tuned to use the tag rankings for determining results order.
Then again, there's enough.. people on Pinside... maybe this is a terrible idea. 
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Thinking more: it might be worth a generic tags ability; and then have a set of predefined (perhaps moderator defined) theme tags, feature flags (ie 4-player), perhaps others TBD. Given the crowdsourcing of applying those attributes, it could make the search pretty powerful.
Downingtown, PA
