Care of winbeta.org and all the other peeps that have sent in the news: SP-1 Final (build 1106) is now available to the public-at-large. This is NOT the "premierdownload" link some had discovered earlier.

Haven't confirmed if the file is an exact match for earlier releases. http://download.microsoft.com/download/whistler/SP/SP1/WXP/en-us/xpsp1_en_x86.exe