I've got a pre-release (or "ashcan") edition of Principia to bring with me to Gen Con this year. You'll be able to buy it at cost at the Forge booth ($11). The reason I'm selling them at cost is because I'm still tinkering with the game. It's ready to play for a group that's ready to tackle a work-in-progress and maybe help me tweak the design a bit. This is a chance to help me make this a game YOU would like.
Also, as a bonus, ashcan purchasers are entitled to free PDF copies of all future editions of the game.

It looks pretty, but don't buy it if you're waiting for the real first edition. That will be prettier and probably more streamlined to play.

click for largerLabels: gen con, principia