This project has now been updated for Lion and Mountain Lion, so it supports:
- Lion document versioning and autosaving
- Undo and Redo for all UI actions
The code's also been cleaned up so it builds cleanly under Clang/LLVM (apparently some of my Objective C programming habits from the time I first wrote it are now considered "archaic" by the static analyzer - that's what you get for learning it in the early '90s!)