It does work, but don't do that :) At least if you're generating, for example, very big lists : everything evaluated in your program will be displayed. If your code contains something like (= foo (range 1 1000000)), you'll somewhat regret it...
But, in many cases, that will work just fine, despite the noise generated by the repl. You can also do mzscheme -m -f as.scm < myprogram.arc >/dev/null to turn the whole output off (in case you don't need it at all).
