Has the "Darkest Africa" fad passed? I hope not. The Wargames Foundry line of figures by Mark Copplestone and others sparked a hobby-wide interest in miniature wargames that were more role-playing oriented -- adventure games, if you will. If you're still playing darkest Africa games -- or if you're thinking about getting into them, here's a good site with historical maps of Africa.
I don't know of a miniatures wargamer who hasn't tried to write his own set of rules. And unless your rules are extraordinarly simple, that means thinking about dice probabilities. Here's an article on die probabilities with d6s, with a special focus on DBA and Warmaster.
Here's a treasure trove for you science fiction miniatures wargamers: The Starship Schematics Database has illustrations of hundreds of spaceships form the Star Trek, Babylon Five, Space Battleship Yamato and Battlestar Galactica universes. I think these would particularly useful as a source of illustrations for home made counters for your games.
Over at Small Cuts, there's a really neat essay on the author's life in painting wargames figures. Beginning with Humbrol enamels, the author write of his progress with materials and techniques.
I got the Lord of the Rings Extended Edition DVDs for Christmas and have been spending my (free) time rewatching the trilogy. This, of course, has caused me to restart work on some Lord of the Rings stuff. I think a neat little game could be had in doing a Fellowship versus the Watcher in the Water scenario at the gates to Moria.