Microsoft have released XP SP3 Release Candidate (RC) and Windows Server 2008 RC1. You can download both from MSDN and Technet.

Windows XP SP3 contains mainly bugfixes and a lot of previously released enhancements for XP like MMC 3.0, MSXML 6, BITS 2.5 and WPA2. There are some new features as well:

  • Network Access Protection (NAP): also available in Vista and enforced using Windows Server 2008 infrastructure such as DHCP and NAP.
  • Windows Product Activation: it is not necessary to provide a product key during installation of a full, integrated installation of Windows XP SP3.

More information can be found here.

A feature that is not available is SSTP or Secure Socket Tunneling Protocol. Next to PPTP and LT2P/IPSec it is a VPN protocol but all traffic is tunneled through an SSL connection over port 443. Windows Server 2008 RRAS provides the server-side of SSTP tunneling and Vista SP1 contains the SSTP client portion. But XP SP3 does not seem to contain this feature yet.

Windows Server 2008 RC1 has one big new feature called Group Policy Preferences. Kurt Roggen has already blogged about it here and his blogpost clearly shows what the feature can do. Other info can be found on the Windows Server Division Weblog.