Also on the Kingpin front, IPlayGames Kingpin Map Tutorial - Part 4 is up, adding to their ever-blossoming Kingpin Mapping Guide. The new chapter offers tips on how to make platforms using Kingpin Radiant (and presumably other editors that support Kingpin entities), and "how to make use of the surface and content properties of a brush to make your environment more realistic." Previous chapters include tutorials on the basics, expanding your map, and complex doors.