So it with a sense of relief that I can now report that drag and drop slipstreaming--excuse me, offline updating--is still happening. It's just not happening in Vista SP1. "Vista Service Pack 1 will not be able to be applied as an offline update to prestaged install images," Zipkin told me. "But this will work as planned with future update, post-SP1 updates. We ran into some unexpected issues with the servicing stack, so we can't do it for SP1. But we're planning to add this capability for SP2, though we can't make any promises. This will be a bigger issue around SP2 than it is now. We think this is a one time thing. But you can still make your own slipstream DVD using the old '-integrate' method as with XP if you want to."
OK, on to other things.
With Windows Vista Service Pack 1, there are essentially three ways to get the bits. The simplest way, an integrated or slipstreamed DVD that includes Windows Vista with SP1, will ship in early 2008. So customers who buy boxed copies of the OS starting in early 2008 will simply get both in a combined package. The same thing applies to volume licensed versions of the OS and versions that ship with new PCs: Vista will simply be integrated with the SP1 updates and that will become the baseline Vista OS going forward.
The second method is aimed at consumers and small businesses: They can simply use Auto Updates to automatically download SP1. As with previous Microsoft service packs, it won't be automatically installed, however: Instead, users will see a prompt about the release and opt into the install. The download itself is (in the beta) and will be (in the final version) about 51-55 MB, depending on the system. (XP SP2 was 110 MB.) "It uses differential technology to decide what it needs to download," Zipkin explained. "It scans your system, looks at what you need, and then only downloads those files."
The third way is a standalone installer, and this is, perhaps, the final bit of controversy and misunderstanding with SP1 today. There are three scenarios for the standalone installer, which includes everything any customer will need to move from Vista RTM to Vista SP1: Corporations that need to roll out SP1 in volume, third party services (like Best Buy's Geek Squad) that need a mobile and offline updater, and users with no Internet access. The standalone installer, by necessity, is larger, but it includes all 36 languages currently supported by Vista and will work with any Vista disk. Right now, it weighs in at about 1 GB for the x86 version.