I just submitted the camera-ready version of “Tangible Functional Programming”, for ICFP ’07. I’m happy with this version. It’s improved drastically since my first submission to ICFP ’06, thanks to many helpful comments. I’ve also been recreating the implementation on top of DeepArrow, Phooey, and TV, in preparation for a software release. It’s getting simpler, but it’s not as simple as I want.