As for shootout , that would be a good idea, but the current implementations (arc2, arc2c or even others) aren't mature enough to compete.
I mean, arc2 takes 3 sec. to startup (and it cannot even take command line arguments) and arc2c is not meta-circular yet (and lacks a lot of things, including command-line args, but that is easy to add), so a real benchmarks would need both arcs (one to compile, the other to run the compiler). I don't know the precise status of other implementations, but I guess they aren't mature enough either.
And, that's a chicken-and-egg problem, but I don't think the shootout admins would accept to add an Arc implementation until the language is a little more popular (or there would have thousands of languages referenced).
