Over at Miniature Wargaming, there's a link to IronHands.com's list of Terrain How-To Pages. It's frustratingly inspirational-- I have all the ingredients listed except for the vision, patience and the skill. It's one thing to make terrain from scrap, but this stuff ends up looking professional. I just don't see the trash anymore, even when I know what it is! Looking through their links, I see a few sites I haven't noticed before: Parasitic Studios and NetTerrain.