Whether you are a Developer or a IT Pro, some of the changes that are going to occur with XP SP2 may affect your applications.
Here you will find all of the resources you will need to understand all of the new security enhancements and setting changes that are part of XP SP2.
You can download the Technical Preview from here. Please note that it is still in beta, so install it on a test system.
Developer training is available here, and if you are a Web developer, also have a look here.