The GameGirlz Course In Level Design is now accepting sign-ups for these IRC classes that will be conducted by Dolomite of the D-Team. Here's the skinny:

Run as an online course, people who sign up will be asked to take part in IRC classes and forum discussions. Even if you know nothing about creating levels, by the end of olomite's course... you will! This editing course will include topics such as: Getting Started, Planning, Grids, Geometry, Textures, Light Entities, Speed, Advanced Geometry, Geometric Abuse, Working with Mods and Their Authors, Teamwork, Online Presence, Dispositions, and Hard Stuff.