Good this meets the challenge. The only thing I would have done different is to have polished these keys and removed the dust..hey but no penalty for that.
Being a computer technician I have definite liking for this photo (even though the keyboard does need a little bit of dusting). Very creative idea, and I enjoy how the focus is actually on the Q A and Z. Incredible work!
Although I do see a vanishing point, I just don't see much visual impact. I do see a lot of dust, though. It's very important to make sure your subject is clean and not dusty.
More depth of field and a less distracting background would have earned this one a couple more points. Using the keyboard is a good idea, it's a nice change from railroad tracks and roads.