When I was making my fronts, it came time to make a "When you enter the territory of the bad guys" custom move, and I was like "I'm sure someone has already come up with a really provocative version of this" but I couldn't find one.
Making custom moves is easy, but making those custom moves that really draw out horrible implications and drive interesting behaviours is an art form. I think a dedicated forum just for posting, discussing, and improving custom moves might make it easier to find interesting things. At the moment they're kind of being lost in the Apocalypse World forum.
I'd be happy to talk about alternative ideas though too. A wiki? A searchable database? A seperate forum entirely, that takes advantage of tags and searchability?