I just did an interview on .NET rocks about cloud computing.

We covered a whole bunch of topics including:
                     what is cloud computing
                     comparing the various offering of Google, Force.com, Amazon, and Microsoft
                     the social and economic environment required for cloud computing
                     the implications for transactional computing and the relational model
                     the importance of price and SLA for Microsoft whose offerring is different from Amazon and Google
                     the need for rich clients even in the world of cloud computing.