We are still around and working on additions and improvements including a massive rewrite of the code. There are various ideas that are being worked out and there are also a bunch of different versions that we are testing. However, this all takes a lot of time.
Note that if you have devices that are not supported, then the only way to get them implemented is to follow the procedure on the development page and mail your log data to firstname.lastname@example.org
Note that in case of temperature sensors the log data must contain a few different temperatures and you have to supply information on the actual tempurature that we can expect to find in the debug logs. In case of cheap Chinese doorbells or on/off switches then note that we are not adding support for individual devices but are working on one complete solution. In case of devices that have a rolling code then you need to know that it will in most cases NOT be possible to add them to RFLink. Also note that when you send in debug logs, you might be asked for another log or receive a test version. However, it often happens that there are no responses to questions and no feedback on test version.
If you want to contribute by writing manuals, explanations, plugins for home automation software or anything else then go ahead. We can post anything you have on the website or publish links to where ever you have posted the information.