About 14 years ago we built a rather complicated 24 channel DMX to Analogue converter for a local church. A fews years later we were getting quiet a lot of requests for something similar. So we designed a small little DMX module with 8 analogue outputs on it that could be embedded inside a dimmer.
The main processor on the board is capbable of driving upto 64 channels, and there are break out points on the board to daisy chain additional expansions modules. Although at this stage there is not a specific expansion module, the main PCB can be used as one wihtout fitting all the components.