DS Map Book

After doing a complete uninstall of 9.1 and installing 9.2, I'm wondering - Why is the DS Map Book not part of the core software installation? The sample has been around a long time (8.1.x ish?).

To me the Map Book capabilities are basic functions of the software. I've found that most people who use ArcMap on a regular basis end up install Map Book. This is even more impressive because doing a search on the knowledge base won't link you to the download, (but there are plenty of discussion forums mentioning it). You'll find it only by searching on EDN.