Hi, thanks for posting these links, and sorry for posting late to this thread. I don't spend a lot of time on this forum, and often turn up late.
I have a G2, and frequent the electro-music forum. Rob Hordijk is very astute. I am an electronic engineer, and majored in communications theory, signal processing etc. From an engineering perspective, Rob Hordijk's synthesis observations and designs are very insightful, and also technologically very creative. He really gets it. His tutorials are fantastic, but he also posts some other great ideas in the threads at electro-music. It can be really easy to miss the crux of some of his ideas, which can use mathematical principles in rather creative ways.
I think the members there who have stood out to me are:
Rob Hordijk
Roland Kuit
Chet Singer
Wout Blommers (very friendly, knowledgable, community oriented guy)
There are a few other things I think worth looking at from there, pretty Nord Modular oriented, but contain many trasnferable principles.
I think someone may have mentioned the Wizoo book on the Nord modular? I thought it was hosted online somewhere, though I haven't turned it up just now.
Chet's physical modelling Some collected interesting threads Some workshops, maybe some replicated material here Roland Kuit's tutorial DVD
I have to say that technologically, the Nord modulars are out dated these days. They are closed systems, with no further back end development. The current crop of VST modulars offer much greater flexibility for sound design. Analogue modulars also have much heartier sounding oscillators and filters. Kyma, and also synth oriented programming environments and languages, of course, are another step again. I think the Nord modular kit still has some good points though.
Cheers,
oli
edit - should note, I have only skimmed through this material, not really examined it in depth yet