Offline line-tracer contest

Dear fellow robot makers!
We are starting a series of offline robot contests. You will have to videotape how your robot performs certain task (we start with line-tracing) and post your results online. No prizes other than global fame are offered.
See for more details and for printable track maps. There are also links to
It would be especially interesting to see results of 3pi robots, but all other robots are equally welcome.

Track on letter paper: 10 sheets
Track on 11x17 paper: 5 sheets
Here is how my robot does it: