The more i work with the so called grid technologies : Soap , Web services , Globus , the more i realised that there is nothing new. A big network to share resources, and in the end what does it means : facilitating access to resources not really managing them. Its more like packaging PKI + SSH + XML .
Scientific still code there application the same way they use to do it. Maybe when we start to add a layer of virtualization of resources thing might start to really look like a grid. But until this happen it just a bigger ssh with a buzz word .