The challenge is on

[Shad]

Okay, I received a challenge.  What do I do next?  Is this a "pick whatever scenario amuses us" situation, or "everyone will play the same scenario" situation?

Over the weekend I'll add the ability to tell the ladder what scenario you're playing with the opponent, and mark it complete with a winner. This is a gradual implementation process.

Peter has covered the basics. It's really entirely up to you two. If you're at loggerheads I can arbitrate, but since there's nothing at stake here I don't think that will be necessary. Just agree on a scenario you think you'll enjoy and have fun!