I'm in the process of writing few general LD articles. One of them is nearly complete, which is The Making of Mash-Up Streets. An article which covers planning, sketching and building of Mash-Up Streets for Quake 4. The second one will be concentrated mainly on planning. I also had an idea to write several mini-tutorials, which will be short, but added weekly to the site. Join the forums and tell me what you guys are looking for. What kind of articles interests you. The Making of Mash-Up Streets should be published shortly.