There are a number of options for getting in contact with responsible people for Novini dnes.
Bugs
If you think you've found a bug in the StatusNet software, or if there's a new feature you'd like to see, add it into the StatusNet bug database. Don't forget to check the list of existing bugs to make sure it hasn't already been reported!
You can reach the responsible party for this server at admin@3rdnews.info.
Post a notice
If you have a question about how to do something, just post a notice with your question. Watch your inbox public timeline for answers.