dear list, fyi, alexandria now has an almost full implementation of CDR5: http://common-lisp.net/project/alexandria/ http://common-lisp.net/cgi-bin/darcsweb/darcsweb.cgi?r=alexandria-alexandria;a=commit;h=20080301100637-6b9e8-1613a8ed447e0bbe08aaa53080813b0bed5861e9.gz -- attila ps: no testsuite yet, patches are welcome.