I think data portability is going to be another victim of the tragedy of the commons. I'm sure that most people in the area of cloud computing would agree that more portability would be a good thing for the market. But when you get down to it, I don't think the risks of allowing all of your customers to switch away from you at will outweigh the benefits.
And let's face it, avoiding lock in just isn't as high a priority as some others to technology companies. If it were, SQL databases would have been dead a long time ago.
Ultimately this is a market-driven thing; data portability will continue to be an important issue and will increasingly become a measure of openness that users weigh when deciding whether or not to participate in a service.
And let's face it, avoiding lock in just isn't as high a priority as some others to technology companies. If it were, SQL databases would have been dead a long time ago.