Eric, here's another thing to add to the FAQ: I posted this link in the 10.4.9 update thread but it would be most useful to switchers as well...
Here ya go: Shock and Awe: How Installing Apple's Updates can Render Your Mac Unbootable and How You Can Prevent it.
And people should read the comments, some of them have very good advice as well.
This is pretty scary to someone planning to purchase their first Mac