MVC structural advice - separation of code

[eluser]coffeeandcode[/eluser]
One more thing, the basic rule of thumb I use for MVC is:

- any and all data access goes into a model (whether it's from a DB, XML file, RSS feed, or even just a PHP array)
- any and all html output goes into a view (html can be passed around in variables, but it is not sent to the browser until it gets to a view)
- everything else goes into a controller

The obvious exceptions to the last rule are things that aren't directly related to a data source - things that would normally go into a helper or library. But if it has data, the above 3 rules apply.