VMware shouldn't be in the applications business. They ought to ditch the SpringSource and Zimbra albatrosses and instead work with ISV's to make it easy to deploy virtual appliances to VMware. Administrators of vCenter clusters and clouds should be able to visit an "app[liance] store" and deploy new appliances with one click.
Yes, I know they have an appliance marketplace but the experience is not seamless enough. It should be integrated into vCenter and all of the deployment details should be handled transparently and automatically by the infrastructure.