Open-source software has won the argument. Now a new threat to openness looms with the advent of “Cloud computing” — the delivery of software as a service (SaaS). Moving from one service provider to another could be even more difficult than switching between software packages in the old days. For a foretaste of this problem, try moving your Orkut profile to Facebook without manually retyping everything. The obvious answer is to establish agreed standards for moving data between clouds.
Read the article: Unlocking the cloud