First off is an article about planning for how many virtual machines you can put on a physical server. This is a little like asking how many angels can dance on the head of a pin. Even when you do plan it out to a “T”, workload on a virtual server isn’t likely to stay fixed, leaving either overload or wasted capacity. This is where cloud computing comes in really handy. Shift your virtual workloads between physical servers on the fly and tune for optimization rather than betting all or nothing on getting it totally “right” the first time.
Next is the story about Sioux City Nebraska filling 100 acres of land to get it above flood level for data center use. I’ve seen a lot of less than practical things done in the name of data centers, but this has to be one of the most impractical, I think.