As Repbot needed some database backup anyway, I have decided to make the respective files available publicly. I hope this encourages coders to work with them and maybe produce some useful derivative work. In case you are interested contact me, I've got some ideas.
The data is written to
http://openfibs.sourceforge.net/repbot/backup/ each Sunday at midnight CET. The uploaded file is labeled with a date/time stamp and old files are not deleted (currently). File Format is Mysql 5 dump.
Enjoy.