Paul Thurrott just posted on his blog that the much awaited Windows Vista Service Pack 1 is now available for public download. For those of you who are adventurous you can get it from the MS Download center (32bit or 64bit). These are fairly large downloads it looks like so low bandwidth folks should expect this could take a while to get. The 32bit is 434 mb and 64 bit clocks in at a whopping 762mb.
UPDATE: Its been widely reported that some installations are breaking peoples systems. So install at your own risk!