Unfortunately hackers trashed the forum some months ago. They have been working to restore it from backups but has been slow going. (I think the messages are intact but I believe it is restoring the links to the embedded images which is giving problems.) I hope it does come back eventually. It is a huge source of information and tracks the history of the developments over a number of years. Suggestions for targets and calls for observations are posted on the connected spectro-l forum though
https://groups.io/g/spectro-l/topics
Cheers
Robin