This is a great concept and great news! (I often felt that books were trapped in Etoys, only visible to readers who bothered to download Etoys.)
2 thoughts:
(1) What blogging API(s) do Pier and Storymill support?
(2) The VisualWorks Smalltalk program BottomFeeder is open source ( http://www.opensource.org/licenses/artistic-license-1.0 ) and has quite comprehensive support for four blogging APIs.
# Blogger API # MetaWebLog API # Movable Type API # CST API
BottomFeeder source code might be a good guide to develop similar capabilities for Etoys.
Hope that helps. David