Thanks for the complement on CSIO.
As for the Wilderlands, the simple answer is that it is whatever you want it to be.
The Wilderlands Boxed Set due out in September (or early release at GenCon in August) is a combination of 4 sets of maps and support material put out by Judges Guild years ago as well as adding information from other Judge's Guild products. It is a massive product with 18 maps and 2 books with hundreds upon hundreds of pages of information.
Most of the information is both specific, yet general. In other words, we give you enough information to run a game there, but not so much information that it traps you into doing something you don't want to do. The basic rule in the Wilderlands is, "If you want to change it, well, change it." Villages, towers, people, items, lairs, and more are all presented with enough information to get you going, but not so much that you can't easily change things to match with your campaign style.
We actually ended up with very few stat blocks in the books simply because it would have gotten so large that publishing it would have been insane. This means that the most basic stat information is presented (or you reference the MM). Creatures that are advanced or special do have d20 stat blocks, but really, this setting material can be used for just about any fantasy gaming system.
I look at the boxed set as a "Toolbox," it gives you everything you need to run an exciting campaign. We try to provide as many tools as possible, but in the end we realize that you want to run YOUR campaign, not ours, so we try to simply provide the tools to make your job easier not to try to do the job for you.
If this didn't completely confuse the issue, then I got more sleep last night than I thought I did. If you liked the level of detail in City State of the Invincible Overlord, imagine that type of product, but for a campaign world.
Patrick