When I get back from my 'semi-retirement'/family sh*t next year, this is a challenge I was going to run, probably in February. This is one that's probably good to announce in advance, so you've got plenty of time to think up a brief for your partner (just don't reveal it until the challenge actually begins!).

For those that are interested, start thinking now about what you want to commission from your partner, and feel free to talk amongst yourselves about partnering up.