Dear list
Thank you for all your replies. They really gave me and us something to chew on. I suppose we will definitely revive a mailing list that is still "lying around" and is hosted by our university [1]; and we will see what additional steps we are going to take.
FWIW, the question in itself was a kind of empirical test - I have cross-posted the same question on different (academic and non-academic) social networks and fora, but - except for one suggestion on facebook - here, i.e. a mailing list, was the only occasion where I did get some feedback. If anyone is interested, I can provide more detail and links.
Thanks again, and best regards
Andreas
[1] http://dlist.server.uni-frankfurt.de/mailman/listinfo/salamanca