This month's issue of UK music technology magazine Computer Music (Issue 153, July 2010) contains a feature entitled Ambient Masterclass, which features Dr Alex Patterson of the Orb, Gier Jenssen - better known as Biosphere - and FSOL's own Garry Cobain giving their tips and advice on creating ambient music. The article itself is probably more interesting to beginners than anyone who's, y'know, actually made ambient music before, but Gaz does take the chance to wax lyrical about the lines between technology and human, and does actually talk about the immersive nature of great ambient music, so it could be an interesting read for fans. Just don't expect any reverb recommentations...
