I do not know whether Duct is maintained or not. @weavejester can respond to that. Our company uses Duct in production for many projects (around 15), and even if it is not maintained we don't think it's going to be a problem in the short to medium term. There is no bug that is preventing us from doing things, nor do we miss any feature to be able to do things. The extensions we're developing are always in Duct modules or Duct components (libraries). The current system is designed to be extended that way, which makes it quite easy. Having said that, in the case that Duct is not going to be maintained we are willing to pitch in and contribute with time and/or money to the project.