I like games, and games are certainly fun at SCA events, so I'm compiling research on them. I have a bunch of research already on Roman games, which I will eventually get around to posting ...

• Linnaeus’s Game of Tablut and its Relationship to the Ancient Viking Game Hnefatafl via Medivalists.net
• The World of Playing Cards (http://wopc.co.uk)
  
• This site is a fabulous history of playing cards with many examples of cards through the ages