The #LiFePO4wered/USB base board build was completed last week, you can look at this project log for details. I also received the #LiFePO4wered/Pi panels from Elecrow:

All parts, panels and solder stencil are now at Colorado Tech Shop waiting to be built, hopefully next week!

I still have a bunch of work left finalizing the firmware and Pi software and documenting the whole thing, but I hope to have everything ready by the end of the month. :)