To put a bit of a kybosh on all the "WotC did it, no they didn't" dreck. The way Dummies Publishing works is they find a "subject matter expert" on the subject (or two or three or four) and have them write a book. Who better than frelance or former WotC staffers? I'm suprised they didn't go after Monte, Sean or Bruce. As for the "permission" aspect, well DUH, of course they got permission! Just like they did for Windows for Dummies (R), MAC for Dummies (R), etc. These guys didn't make a metric butt-load of money by breaking copyright laws.
And as AMG stated in the previous post, they did the same thing with D&D for Dummies (R) a few months ago, literally a beginners guide, honestly, its a really good idea and I wish I had thought of it, I of course would be making the metric butt-load of money now instead if them which would make me much happier...