Documentation about iCagenda is now open ! Not a lot of information, in a first time, but we'll add more documentations step by step.
You can discover using iCagenda by viewing the tutorial videos made by Giusebos: http://www.joomlic.com/docs/icagenda-tutorial-videos
You can also write and add new documentation about iCagenda, which can be on some element, or for some features.
Your proposal will be check by me, edited if neccessary, and adding in the documentation (select 'iCagenda' category, a new category will be created after, if needed).