Google recently launched the Data Liberation Front, an initiative within the company to ensure every one of its products has a clear, easy option for users to export their data in bulk and take their business elsewhere.
We've used it a bit with Juxi and Leopold for the work on the new issue of acta futura, and I think it is quite nice. The problem right now is that only a few people in the team have an account (and I have exhausted my invitations). Maybe you have one or two you are willing to share? :)
Great idea! Isn't it at the opposite of the web 2.0, where machine tends to be only clients and all the data centralized in big servers? I like more this approach of each individuals dealing with their own data, you have more control on what you want to share or not!