Wow, planning, I've heard about that, now I know what it looks like too!
Mostly, my cork-board is in my head. Sometimes those pins really hurt.
No, I won't be joining the fun. I find NaNoWriMo is a bit like a cork-board, it doesn't fit with how I want to write.
That's only partly tongue-in-cheek. I write out some experimental scenes and dialogues as they occur to me, mostly as a way of sticking the pin in my memory about a particular idea (I rarely use those experimental texts directly). And I keep a timeline so I always know where everyone is and what they're up to in relation to one another, but mostly that's something I keep up to date as I go rather than use for advance planning. I've never managed to make the whole advanced planning whiteboard/cork-board thing work for me, either I know where I'm going in my head ... or not. If I don't, the only way I've found to move forward is to start writing and see where it takes me. It is interesting to see how others approach the problem.