I believe nreece's point was that cloud computing is normally defined as using virtual servers. This is not to push uptime and connectivity issues onto a third

I believe nreece's point was that cloud computing is normally defined as using virtual servers. This is not to push uptime and connectivity issues onto a third party, like shared hosting or colocation, but to ensure connectivity in case of unexpected demand (i.e. your site getting slashdotted). If Tonido was a cloud computing solution, a large amount of demand would cause it either to magically launch a new Tonido Plug, or alternatively use the resources of someone else's unused Plug server.