While I don't have Jason's example, there are some other good ones out there

 

Base Master Page:
http://heathersolomon.com/blog/articles/BaseMasterPages.aspx

 

Definitions of the Place Holders:
http://msdn.microsoft.com/en-us/library/ms467402.aspx

 

Design Gotchas:
http://heathersolomon.com/blog/articles/SharepointDesignGotchas.aspx

For our MOSS development, I created a css file that I simply included lower in the Master Page than the system ones so that I could override the styles without having to find them all one at a time.

 

It took a really long time to get a nice master page that covered all the details that Share Point provides.