It's obvious, documentation is always important. It's even more important for proprietary software, since you can't even study the source. But it seems that neither of this two projects has good and extensive docs/tutorials.

You could argue that if Twisted was better documented the FriedFeed guys wouldn't have started their own project. I don't buy it. There could have been many (technical and non-technical) reasons to do this anyway.

I (mostly) agree with a comment on the blog: This is just pure NIH syndrome. It happened because it’s easier to write code than to read it, and it’s more fun to create than to fix.