I created a tribute board for Bob that includes the above quote, and a light intensity to frequency circuit that uses one of the integrated circuits he designed, the LM331. On the front there's the quote and pads for both surface-mount and through-hole components. On the back there's the circuit diagram as a silkscreen overlay (the circuit is taken from Figure 20 of the LM331 datasheet). The corner holes can be used for power input or mounting holes. Maybe this board would be a fun way to introduce kids to soldering!
Here's how the board is rendered by webGerber (there's an error with opening the drill file, so the drills are missing):
Here's what it looks like in Inkscape:
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Finally, the look from gerbv:
I wonder what would be Bob's reaction to this board ;)
If you'd like one of these boards, let me know so I can make one for you!
(UPDATE: see a more recent draft of the board here)