I made a couple more changes and I read more about routing, nets, and the like. I ended up using 10mil traces, 13mil for 5V/3.3V, and 18mil for GND/12V with 10mil spacing.
Here she is: MiniLink v1.1 (3)
We are still at less than $5 per board if you order through DorkbotPDX. Should be...