Thanks again for all your votes and excellent feedback! The results are in, and we'll make the shirts in Brown, Red, and Purple. Given all of the interest, we've expanded the production to 30 units per color.
For the shape, we'll go with the slim point collar and a single left chest pocket - with no bias cut. There won't be a flap, but we'll have a single button closure for the pocket. The fabric is really bold, so we'll keep the shape simple and let the colors and patterns do the talking.
I called my fabric guy on Monday from a tiny farm in Panama (one with surprisingly good cell phone reception) and ordered the fabric. We should be good to go with a complete delivery before the party. All the shirts will be available for online purchase as well.
We'll definitely offer a free gift for multiple shirt purchases. I've got a few possibilities, and I'll work them out once I get back to the States on Monday.