In July 2006, after our first world robocup competition in Bremen, we ran David Wheeler’s SLOCCount on our codebase, when our SLOCCount was 33K. Today, I ran the script again, and our SLOC readings are nearly twice as high.
The big changes come from another 10K lines of C code for recognizing lines and the new goals, and 16K lines of Python code that define the behaviors we used to win last summer:

Total Physical Source Lines of Code (SLOC) = 60,496
Development Effort Estimate, Person-Years (Person-Months) = 14.85 (178.25)
Estimated Average Number of Developers (Effort/Schedule) = 9.95
Total Estimated Cost to Develop = $ 2,006,571
(average salary = $56,286/year, overhead = 2.40).
SLOCCount, Copyright (C) 2001-2004 David A. Wheeler

I’d be curious to know what the SLOCCount of other Aibo teams is – especially the GermanTeam, and the NUBots.