I ran David A. Wheeler's 'SLOCCount' on 12/28/2007 and found that SeniorQuoter contained 3.66 person months of code. This would have cost $41,153 to develop had it not been written by volunteers.

Total Physical Source Lines of Code (SLOC) = 1,493
Development Effort Estimate, Person-Years (Person-Months) = 0.30 (3.66)
(Basic COCOMO model, Person-Months = 2.4 * (KSLOC**1.05))
Schedule Estimate, Years (Months) = 0.34 (4.09)
(Basic COCOMO model, Months = 2.5 * (person-months**0.38))
Estimated Average Number of Developers (Effort/Schedule) = 0.89
Total Estimated Cost to Develop = $ 41,153
(average salary = $56,286/year, overhead = 2.40).