hook_view() and hook_nodeapi($op = 'view') have changed

This passage is not helpful at all:

Nodes are now prepared for display by assembling a structured array in $node->content, rather than directly manipulating $node->body and $node->teaser. The format of this array is the same used by FormAPI.

Users need to know what replaces $node->body and $node->teaser. I recommend adding an explanation of exactly how to manipulate the body and teaser, something like this:

Instead of modifying $node->body or $node->teaser, you now modify $node->content['body']['#value'].