As you'll read in the Design Blog, the main component which everything else is built around in IMDL! is the reconfigurable dice. There are not many companies that produce them. Rio Grande (the makers of Rattlebones) and more recently Asmodee/Libellud, who have just released Dice Forge, (very fun game) are the only two I've found. (Not counting the Lego games.) Which means all roads lead to them.
The final event of the year that Rio Grande were attending was Gencon just gone. I found this out about 3 weeks before the event. My very understanding wife said if I needed to go, I should go, but it was the big 50 for GC, and tickets were extremely thin on the ground. Unfortunately it wasn't gong to happen.
So I'm going to have to wait. The next available time will be the middle of next year to have the opportunity to speak to Rio Grande in the flesh.
Which brings me to important lesson number two: Plan ahead. Don't wait until the last minute until you think the game is finished and then expect everybody to queue up to look at it because it isn't going to happen.