I've stored all my field values in #_content table, and can also import articles there. But, Seblod does not recognize those articles as seblod-made content. What entries are needed in the #_assets table? (And, are there some more tables that need to be respected?)
Make sure you've got the "title" and "catid" columns in your .CSV, as those are not being mapped - even if you have custom fields that will store in the corresponding database tables.
This took me a few hours. Additional info is to be found here: https://gist.github.com/2dpi/4130110
Regarding your response to marcmueller's problem i suppose that alternative csv import tools can work with seblod too since the file is imported in the db in any case?
It is probably possible, but not very easy as Seblod uses a lot of related tables that need to be filled on import. I would not recommend using anything but importer.