Adam Miller mentioned today on his blog that he is very close to releasing his Pirate Cards game to the Vault soon. It seems to be very similar to Demon Cards, which was his Magic the Gathering knockoff that worked in Neverwinter Nights 1. It was an extremely clever bit of scripting, and, as it turns out, a ton of fun to play! So I'm looking forward to seeing his nwn version.
Like Demon Cards was in Demon, Pirate Cards will be a mini-game in his upcoming NWN2 series, Dark Waters. That series looks to be a custom content masterpiece, and hopefully the first module will be available in a few months.