I liked it how his profile image[1] is a QR code for his site[2] and also resembles him.[3]
[1] https://lh3.googleusercontent.com/-DGzr5UFEIXM/AAAAAAAAAAI/A...
[1] https://lh3.googleusercontent.com/-DGzr5UFEIXM/AAAAAAAAAAI/A...
Background: http://research.swtch.com/field
Implementation: http://research.swtch.com/qart. It's all written in Go, btw.
Running code, so you can try it on yourself: http://research.swtch.com/qr/draw
QArt coder: http://research.swtch.com/qr/draw