Ok, got my interface boards today. I haven't used them yet, but I can give a few quick comments.
The AKI boards and the 49-way boards are the same board with the exception of 3 resistors, but I am sure the chip onboard is programmed differently. I only note this because at first glance I thought I got three copies of the same board instead of 2 49-way interfaces and 1 AKI. Also, the 49-way boards are silk-screened as AKIs.
The build quality of the boards is decent, not QUITE as nice as the I-Pac or Keywhiz, but still quite nice.
My boards came fairly quickly (a week I think), and I will pot more details once I start hooking them up to stuff.