The documentation will be available with the version 1 of Talend Open Studio (5/10/06). Tutorials
are already availables at http://www.talend.com/beta/training/tutorials/menu.html
The documentation writing is actually still in progress right now, but we do our best to make it available asap.
The component's properties are handled separately and we will probably be able to release them prior to the rest of the documentation. It hopefully will address your advanced test queries.
Thanks for your interest.