That's really cool. A Smalltalk-80 running under an emulator for a Xerox Alto written in Smalltalk (Visual Works 7). Wow. The Dolphin mentioned in the article is one of Xerox's D-machines. I have two compatible systems sitting around here. Unfortunately, I never received the Smalltalk diskettes with the microcode and the image, but so far I've only had the Lyric and the Koto Lisp. Lyric is a nice Common Lisp environment, but Koto is really great: a pure Interlisp-D environment (ok, it's also included in Lyric and in the later Medley Common Lisp, but in Koto it's all pure Interlisp-D!).
I found the Cincom Smalltalk Blog - Smalltalk with Rants and the original article there.