OK, I spent another two hours or so tagging. Got a bit distracted re-reading things, but not all that much.
What I tried to do was to create two tag-forums by using the Google site search to find topics on a) Zimbabwe and b) Sudan/Darfur, and tag the relevant ones accordingly.
The results were rather depressing - not a whole lot of threads, many that died quickly or just kinda underlined how little known even basic stuff about Africa is, and a couple of racist threads, from a white South-African/Rhodesian perspective or otherwise, that I refused to tag. And the longer Darfur threads invariably just ended up partisan slugfests about Bush, Iraq or the UN.
This is what I ended up with:
(now 6 items)
(now 13 items)
(also 13 items, almost but not exactly identical i think)
I did a bunch of other Africa threads too, though, and so managed to beef up the human rights forum a little:
(now 28 items)
Note that 7 of the Darfur/Sudan ones which I tagged had not
shown up in the Google search; I only found them because I had posted an archive of links on one of the threads I did find. Just as a reminder that Google is a far from perfect means to search the site, even apart from not being able to search only one author's posts etc..