Hi Zack,
The Layout files were all created with Mentor Graphics. You can download the Pads ES free viewer here: http://www.mentor.com/products/pcb-system-design/design-flows/pads/pads-evaluation to view the .PCB file. Unfortunately it's a time based trial and I am not aware of any open source viewers that support Mentor Graphics.
A pdf version of all the layout considerations are available in the DS and UG for long term refrence.
The Schematics were created with OrCad, free download here: http://www.cadence.com/products/orcad/pages/downloads.aspx#pspice. This will allow you to view the .DSN file.
The gerbers are cabable of being viewed from any basic CAM software such as Allegro, Altium, or Gerb Tool
Thanks,
Louis Peryea