People keep asking whether it's possible to play non-standard mod X on a given headless server, and in most cases the answer to this is 'no'.
So I'm wondering how much work would be involved in making it possible to have an FTP upload account where people whom the server admin(s) trust(s) (and is/are happy to pass a shared, or - slighly preferrable - unique, password to) could upload additional mods.
I guess this would require making the FTP server available continuously, but if it can be assumed that the current implementation of the FTP protocol (the modifiesd featheryftpd) is mostly stable then this should be doable.
Clearly, the lack of extra mods on headless servers is an issue to date. I remamber that Treba had provided a script to at least install those mods which had been approved, but the real issue is that most mods are never approved because their makers never apply for it. Which, in the end, means that people are unable to play these mods on headless servers. That's not really the fault on our end, but I guess we still want to make things easy, so it maybe good to revisit the options available on this layer.