I discovered my local Habitat for Humanity Re-store. They are cool places. If you have one in your area, check it out. It's a great resource for DIY'ers that also supports a helpful charity. We've donated stuff there too, and it worked smoothly.
Anyhoo...while there I picked up this beautiful piece of wood...which just so happens to be an unstained cabinet door (for $5). It's completely square, so kind of an odd size for a cabinet door, but excellent for a craft I have in mind.