Read a binary is implemented and tested. It works, as in previous version.
But Upload is not impemented. The name of the file is obtained from the file upload field. It is passed to the setPropertyAction cocoon action. I don't know if the inputstream can be created there or if it has to be generated before, and passed as argument to the cocoon action.

June 9, 2010 :
Upload works in the JCR tab (using form.submit() instead of API Servercomm).
In the Ametys tab, it doesn't work inside RichText and Folder because it's not the correct form that is submitted.