CNET has a story on the upcoming XP SP2:

To encourage use of the security features in Windows XP SP2, the company is planning service packs for its core developer products--Visual Studio.Net and the .Net Framework--for release around the middle of the year. [more]

We will be running a series of activities in the next few weeks around getting this into the hands of local ISVs for testing against their application. I will be posting info about this, as more details come together.