Since 2004 I've taught myself, and others, in just about every discipline the Source engine offers (shaders are the last big exception). I'm particularly proficient in mapping, writing, choreography and audio scripting. I'm always happy to dip into a project and offer some advice, so PM me!
How to get started with modding Braid, including accessing the editor and launching custom universes.
Find official tutorials at the official WinterMute Wiki.