The previous product (formerly known as wpmultisite) found on this site can now be found at WPSiteStack.com. WPSiteStack.com is just a new name for the same product. The name change/re-branding was done as an attempt to eliminate some of the confusion concerning the two products. The product WPSiteStack.com has a slightly different purpose than the built in multisite functionality of WordPress.
We’ll now use this site to publish information on both the built in multisite functionality of WordPress and the WPSiteStack product. We’ll try and show some of the differences and give you some guidance as when you might want to use one over the other.