What is Cloud?

After hearing so much about Cloud Computing [1], a few months ago I decided to find my own answers...

You can find these in this document: What is Cloud? [2] Named after the famous “What is Grid? A three point check” [3]. I don't expect my document to reach such a high level of visibility, but it might start a few discussions...

Following is a short teaser:
I start by introducing distributed computing and Grid because, frankly said; I didn't think there was anything new in Cloud. However, the principal points I’m trying to make in this document are:
We’ve reached such a high level of complexity and size in distributed systems that more and more tasks should be managed automatically.
Computing resources are not only the usual data or processor time anymore, but could be anything.

I’ll follow the discussions over on wiki and in the different events I’ll attend because these two points are at the base of my work.

More on this later as I am working on some exiting stuff related to Cloud and security…(did I hear security in Cloud computing?!).

[1] http://en.wikipedia.org/wiki/Cloud_computing
[2] http://homepages.cs.ncl.ac.uk/pierre.de-leusse/files/whatIsCloud.pdf
[3] http://www-fp.mcs.anl.gov/~foster/Articles/WhatIsTheGrid.pdf