Adrian Cockcroft's Blog - I come to use clouds, not to build them... | Good stuff here.

My question is what are the alternatives to AWS from a developer perspective, and when might they be useful? However I will digress into a little history to frame the discussion.

There are really two separate threads of development in cloud architectures, the one I care about is how to build applications on top of public cloud infrastructure, the other is about how to build cloud infrastructure itself.