DotCloud is definitely interesting, but I am somewhat concerned about the lack of prices on their homepage (there is not much point in doing business with a company without knowing their price) as well as the signup for their beta - I don't (yet) know what language I would write the code in, as that would depend of the actual usage pattern of the software so I can't sign up?

Anyway I will add this to the list of things to look at at some later point.