Just stumbled on a great site that seeks to help developers with Vista compatibility.

 Welcome to DevReadiness.org - the community site dedicated to helping you, the developer, get your applications ready for Windows Vista.

Pasted from <http://devreadiness.org/>

Nice gem from the site:

The Cookbook is a comprehensive guide of Windows Vista changes that can affect XP application Compatibility. This is a MUST read for all application vendors seeking information on upgrading XP applications to Windows Vista.

Pasted from <http://devreadiness.org/files/5/white_papers/entry10.aspx>

Next stop RC1, see you there.