Self is an experimental programming system developped at Sun Microsystems. The language itself is similar to Smalltalk, except that it uses Russell Allen. Much information can be found at http://research.sun.com/self/index.html. A slightly more linux-friendly version is being developed at http://www.gliebe.de/self/index.html. Of course, between glibc-2.2 binaries and an uncooperative source tree, I haven't actually seen it run.
