I would like to introduce cuhk.cs.1720 to you. "cs. 1720" is the course code of Introduction to the Internet. Thus, the message of this newsgroup is mainly for those students taken this course.
However, it is also useful for us. Every lecture notes are available here. I have read one of the lecture notes, which introduces the available newsgroup such as alt., talk. and cuhk. in the computer network of the Chinese University of Hong Kong. Besides, some students recommend fascinating newsgroups - hk.entertainment, hk.general, cuhk.forum and so on. I found "hk.entertainment" is a quite entertaining one. In "hk.entertainment", people give their opinion on hot issues. On the contrary, some people treat it as a private mail box, they give some nonsense idea there.
Moreover, the lecturer also gives a lot of public accessible mailing lists. For example: http://www.cesi.it/flag/ is an attractive one. It is the creation of worldwide real-time updated database about all kinds of flags: (inter)national, (un)official, ethical, political, religious, movements' flags. Discussion of symbols of colors used on flags, in order to find common and/or unique meanings of them. Gathering information is about flags' history.
From my point of view, no matter you are interest in the Internet or not, "cuhk.cs.1720" is a good newsgroup to take a look at it.
