Thanks to Sim31 in our forums ...
Well it seems Microsoft have finally made the final jump and have released this long awaited update of Windows XP Service Pack 2. The official build for RC2 is at 5.1.2600.2149 (xpsp_sp2_rc2.040610-1520). The update is available for official testers to download from WindowsBeta, and might soon become available as a public preview for all to download. We hope to see many bug fixes in this build, especially since Microsoft took a lot of care with rolling out this next Release Candidate. More screenshots to follow!