it's on my "to buy" list.
Any other resource?
InDesign CS5: Dynamic Publishing Workflows in XML with Jim Maivald (the author of the book mentioned by Steve)
XML Publishing with Adobe InDesign by Dorothy Hoskins
Related question: where can i find some documentation about the "aid" namespace (i think that's the correct term? for example: <element aid:pstyle="blahblah">
Adobe InDesign CS3 and XML: A Technical Reference -- Page 20