Wired News: Windows XP Can Secure Music - Details on the Secure Audio Path (SAP) technology, which copy-protects music. - http://www.wired.com/news/technology/0,1282,41614,00.html
Windows XP: What's in it for Developers? - From MSDN. A detailed programming analysis of XP, including the Theme Manager. - http://msdn.microsoft.com/library/techart/winxpintro.htm
Techweb: Microsoft Releases Windows XP Beta 2 - Microsoft took the next step toward unifying its operating systems under a single code base by releasing Beta 2 of its upcoming XP. - http://www.techweb.com/wire/story/TWB20010327S0011