Anyone Built a keyboard from Scratch??

[Semaj]

Has anyone here actually built a key board (or tried to) from scratch, instead of just modifying? As in purchase micro controller, design circuit board, ect...

I have been looking at the chips available for doing this on the Texas Instruments and ATMEL web sites and trying to figure out how hard/ how much work it would be.

http://www.atmel.com/dyn/products/tools_docs.asp?category_id=163&family_id=607&subfamily_id=760&tool_id=3879

http://www.ti.com/tool/tusb2136tps2149pdk