The announce server appears to be running here
, but the link on the forum does not seem to have been updated.
Currently, the development builds do not have differentiated version numbers. This was not a problem before nightly builds were introduced and when nobody was trying to play them online to test them, but is more difficult now that there are nightly builds. I am planning to look into a way of giving the builds unique version numbers when I have a chance.
I do also plan to look into the method by which the server is kept up to date (I think that it needs to be programmed to save then restart automatically in the middle of the night when nobody is likely to be playing it so that it always gets the latest version), but I have not had a chance to do that yet, either.
Hopefully, when those things are done, it should be clear what version that the server is running, which should be kept automatically up to date. My apologies for the difficulties that you have been having so far.