In case anyone is interested. I am currently developing a Casambi binding. It can be found at
Currently lights can be controlled (brightness, color etc.) and there is discovery (manual).
If you want to use it, you will have to compile (with the OpenHAB development setup) and install it yourself. You will also have to get a Casambi developer key etc. (see README.md).
The binding is not yet ready for inclusion into to OpenaHAB source tree, but some day I hope to get it ready.
Comments and suggestions are welcome.