As expected there is a huge amount of people currently talking about the vSphere launch, more information is coming out everyday.
Here are some of the most usefull links
Yellow-Brick.com is creating a comprehensive list on their website here >> http://www.yellow-bricks.com/2009/04/21/vsphere-linkage/
VMware-Land.com also has a comprehensive list on their website >> http://vmware-land.com/vSphere_Links.html
For the VMware official launch video and more visit here >> http://www.vmware.com/landing_pages/nextgen.html