Stop it with the meta-decisions - learning Arc will take up one thorough afternoon. It's worth it because you'll start seeing ways of writing code in any language that mimics features Arc has.
Clojure will give you jvm knowledge (which could help you get a job). It also forces functional programming which is becoming more important. I think everyone interested in a new lisp should help Clojure. It feels more like a viable lisp in the short term than any other.
Arc3F has a launcher script for Linux which is supposed to work with any sufficiently Unix-like system (it's tested and works with GNU/Linux, specifically Ubuntu Hardy Heron; AFAIK the others here don't have problems, so it'll probably work with a large enough percentage of GNU/Linux systems). It also has a launcher batch file which is supposed to work with Windows; eds and b0R_ report that they have managed to run Arc3F with that batch file.
You are not supposed to use mzscheme -m -f with Arc3F, although I haven't actually tried; it might work.
