Microsoft had released the much waited Service Pack for Vista SP1 after months of waiting and interim release candidate for public download, you can also expect retail copies of vista with SP1 in stores in a couple of weeks.
As for the SP1 the updates should be visible via Windows Update (for most of you) but if your machine has some problematic drivers that Microsoft has identified the SP1 update wont be there for you until newer drivers get released, You can also download the full SP1 from …