I like the prefix better (from a sysadm standpoint). What about "np" as in "no project". So, "np-regex-coach@common-lisp.net", for instance. This precludes any project ever being named "np".
Suits me. Other, more verbose, but possibly less confusing prefix would be "list".
So list-regexr-coach@common-lisp.net etc.
Either is fine with me.
Cheers,
-- Nikodemus