Now it is clear, the computer resources are relatively cheap when using it as part of the Terra-computing. If Amazon can offer storage and CPU time lower then the cost of disks and retail computer price while it includes installation and maintenance (for storage it probalby includes backup too), the "Cloud computing" is here.
This architecture changes some of the concepts as can be see here. This time, I want to focus on the meaning of the "middleware" and its role in this environment. According to Wikipedia, it can be seen as "services that allow multiple processes running on one or more machines to interact across a network". So in this case the middleware will connect between resources that are located in different autonomous systems. Wait a moment....that is one of the grid definitions. So do we expect the middleware to connect storage from S3 at Amazon with Google-App-Engine ?
It is simple - YES !
The middleware would need to allow creating collaboration over outsourced resources! In the future we might see the cloud computer providers as telephone companies. Huge companies that offer services cheap. But still the middleware will create different clouds for the programmers and will allow focusing on the business intelligence rather than on the maintenance.
Will it be free ? - I hope not always!
Since the commercial companies (and other users) might need a legal contract (that states privacy), this service should not be always free. On the other hand, and as always, new models will come up. Today the most ubiquitous model includes commercials. As in Hotmail. Gmail. etc. - you do not pay money, but you see our commercials. IMHO more models would be seen.
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