I've written a small patch to ABCL that copies unrecognized command line arguments into ext:*command-line-argument-list*. This is analogous to SBCL's sb-ext:*posix-argv* or CLISP's ext:*argv* (but without the executable name that heads up those variables, since that's not passed in to the Java main() function).
I hope you find it useful enough to merge in.
--Dennis Lambe Jr. malsyned@malsyned.net