I was planning a slightly similar kind of project, but different. I wanted to build an Amiga like case around the OMAP5 EVM devboard. I started building a Pyra like mechanical keyboard using Cherry MX blue key switches and used the same keymat I2C chip the Pyra does to handle the keyboard. Since my devboard still looks like it's broken, I'll need to figure out what to do with what I have finished with the project.