what I see is more or less ordinary lisp that uses a library to solve an issue with applications that rely on http. I'm sure plenty of us could do the equivalent with the appropriate Python/Perl/Php/Ruby library, but then the obvious criticism would be that you're not really comparing lanugages. You would be comparing libraries.
Is it really the case that when you boil it down, Arc (language+libraries) is about making small web programs? If not, why this challenge and if so I suspect it won't live up to the 100-year idea.