(currently on a different machine and location, so I am going to respond here)
Thanks for your quick answer, altough it was negative one.
You wrote, this functionality is not supported by Joomla. Really? If so, that's a real bummer. All those J! core and custom form fields possibilities (I've looked into the docs), and everything is backend only? I can't believe it... Is Joomla limited to that very basic frontend article submission? There must be a way around it...
I would like to hear your opinion and insights as a developer (i don't have enough details and knowledge about Joomla API and the future. Will it be improved to extend frontend forms as well?)
Thanks in advance.