The listing, DIY wooden keyboard B) has ended.
Not a particularly easy project, but VERY COOL :)
I will provide you with 175 watermark-free pictures so rest assured you will not miss a step in the process. ill also give you the source of where i found this in case you want to talk to the guy who has already built one before :)
I garuntee all your nerd friends will be jelous, my friend was sad that he couldn't buy it prebuilt :P
Could cost between $5 and $50 depending on the materials chosen (mohoganny and stained beech is obviously going to have quite a difference) and should take a little more than a weekend to complete if you have other stuff to do. Enjoy :)