Well today’s the day for the VMware vSphere download!
Here’s the download link: http://www.vmware.com/download/vsphere/
Here’s the documentation link: http://www.vmware.com/support/pubs/vs_pubs.html

–Updated– See comment below. Download links are now fully active!
I just tried to download and kept getting a “page not found” message. I’ll keep trying to see when it’s actually active or maybe the site it too busy.