Hi Robert,
Is Fiasco.OC being actively developed(i.e new and on going research, new features) or is it just being maintained (small adjustments, bug fixes etc...)?
yes, it's actively being worked on and our group uses it as the basis for research projects. To get an (incomplete) overview of our research work, you might want to look at our publications list: http://www.inf.tu-dresden.de/index.php?node_id=1429
If you have more specific questions, feel free to ask.
Cheers, Bjoern