Just so the thread readers are aware, this is what I had planned a year ago for documentation:
http://sdm.openacs.org/new-file-storage/download/docs-status.html?version_id=471
We have also discussed several times (in #openacs) the revamping of the developer documents to include more tutorial-like things.
I think improving individual package documentation will go a long way towards making developing with OpenACS easier. This is especially true for new packages.
"No package left behind" could be our motto.
-Roberto