"Designed for Windows XP" Application Specificiation

I've learned a *lot* about good Windows application design from reading the specification that an app must adhere to to get the “Designed for Windows XP” logo.
http://www.microsoft.com/winlogo/software/default.mspx

The “Designed for Microsoft Windows XP“ Application Specification 2.3 cleared up for me a lot of the more enterprise related issues - including why it's a good thing to use the My Documents folder, where to put your data in order to enable roaming and how to lock down Windows 2000 and XP to get an idea of how applicaitons run in the enterprise, rather than on a (usually wide open) dev box.