A while back I read some very interesting, detailed information online about a couple of new features in InDesign CS2; specifically about its enhanced XML workflow for text styles and tables. I'm not an XML pro (yet!) but a number of my publishing clients are really putting it through its paces, so it caught my eye.

The author, who posted this in a private forum, said the information would be included in an upcoming Adobe white paper focused on using XML with InDesign CS2. Most of Adobe's end-user information (white papers and tutorials) on InDesign and XML appears in their Cross Media Resources page, which is where I assume it'll pop up (it hasn't yet, I've been checking):
http://www.adobe.com/products/indesign/crossmedia.html

A couple issues ago I talked about how I had finally finished the book I was co-authoring with David Blatner for the past year, InDesign CS/CS2 Breakthroughs (Peachpit Press, 2005).

In case you missed that issue, the book is a compilation of over 200 of the most commonly-encountered <ahem> "challenges" users encounter with InDesign (Word styles, transparency and pre-press, scaling, etc.) and their solutions, of course. Some content is for newbies, but the lion's share is aimed at the seasoned InDesign user who's already tried all the obvious solutions and is still stuck.

David and I spent months just researching and compiling the topics we cover (interviewing users, trainers, combing the online forums and listservs), let alone writing and testing our solutions, so chances are if there's something about InDesign giving you trouble, the answer's in there.