Papers on the Self implementation technology have been published in SIGPLAN PLDI'89 and '90, OOPSLA'89, and ECOOP'91 (forthcoming). The OOPSLA'89 and PLDI'90 papers are in the collection of papers entitled "The Self Papers" available via anonymous ftp from otis.stanford.edu. Of course, new implementation papers are always in the works, so stay tuned.... -- Craig Chambers