Yep, the Release Candidate 1 of SP3 is ready and can be downloaded via Microsoft Connect. I’m installing it right now.
Those who don’t have Connect can download it via Microsoft Update. You just need to save this file as *.bat and open it:
[removed on request - if you need it go to connect.microsoft.com]
or ask me at: fifi5000[a---t]gmail[dooot]com
And now just check for updates in Microsoft Update 
Oh, i recommend you uninstalling previous beta of SP3 first.
UPDATE:
Just installed 
November 18, 2007 at 5:57 pm
u sure this 100% works?
but thanks anyway.
November 18, 2007 at 9:34 pm
It worked for me…
You have to use legal copy of XP… Maybe it just doesn’t work because of MS.
Here is a torrent with a release of XP with SP3 already integrated: http://thepiratebay.org/tor/3897640/Windows_XP_SP3_RC1_V.3244
November 20, 2007 at 1:07 pm
Hi Filip,
didn’t you saw the note on connect.microsoft.com:
Note especially that distributing this script, or the registry key that it sets, will constitute violation of your non-disclosure agreement, and will result in your removal from the beta program.
Maybe not a really goog move to blog about it…
Cheers!
Daniel
November 20, 2007 at 4:01 pm
Ok, i’ve removed the batch.
Thank you for your support.
November 22, 2007 at 12:03 pm
[...] el “hack” no es nada más ni nada menos que este script que viene de Microsoft . Se puede encontrar también el “hack” en WinFuture. No te [...]
November 22, 2007 at 8:00 pm
[...] a registry key, that subsequently permits access to the Release Candidate of XP SP3, according to Daniel Melanchthon, Technology Advisor for Microsoft [...]
December 3, 2007 at 12:35 pm
Can anyone just list down and give me changes made in SP3. Are those changes really worth or will bring down the performance of the system down by increase in demand of resources required?