Do any of your read Richard Lloyd's column in Guitar World magazine called The Alchemical Guitarist? I've found a lot of it very interesting (although sometimes I have to read the column a number of times before I can "get it").
i just bought my first ever issue of guitar world this week, and had a look at the article your on about it was pretty good it was about playing chords in all keys or something, pretty good exercise to put into a warm up