Yes, that's the one. It's the project the book Dreaming in Code by Scott Rosenberg (2008) is based on. It's a shame the project folded right around the time of

Yes, that's the one. It's the project the book Dreaming in Code by Scott Rosenberg (2008) is based on. It's a shame the project folded right around the time of its 1.0 release -- it looks really promising, but definitely not there yet. So I was surprised to see Joe Armstrong uses it.