CMFTypes is now Archetypes
I wanted to post this late last night but I couldn't get to my site...
SourceForge Project: Archetypes
I used the predecessor to this, CMFTypes. I'm very happy that this effort continues. There's also another somewhat similar project underway, TTWType (TTW == Through The Web, ie: you define the types using a web interface rather than by manually writing a Python module). A while back, my understanding was that CMFTypes/Archetypes was working towards TTW generation of content types as well.