We can do that for you at
XenLayer.com, we have a custom made 1-click wordpress installation script, add a domain, run it and you have everything up.
We can also set up symbolic links for all your wordpress sites to share one central plugins and themes directory so you don't even have to re-upload them. It is also possible to create one Wordpress site and we will create templates to dublicate it. Hit me up, we can have you up on a Xen VPS within 30 minutes and tweak it for Wordpress, which will act exactly like a dedicated server - you will never know you are using a virtual machine.