TechCrunch has an interesting post about how the EU's data protection legislation might prevent the current trend towards data portability. The trend has been to enable users to take their 'social graphs' with them from one system to another. In this context the social graph is more than just the email addresses, it is all those pieces of information.
For example, if you have a list of email addresses in your email system on your laptop in say Germany and you sign up to Twitter or FaceBook and upload your contacts in order to find friends you are probably breaking Article 8
- 8. Personal data shall not be transferred to a country or territory outside the European Economic Area, unless that country or territory ensures an adequate level of protection of the rights and freedoms of data subjects in relation to the processing of personal data.
Users of systems such as social networks currently appear to have conflicting aspirations. They want to avoid spam, marketing, and abuse, but they also want to aggregate all their information so that they can contact all their contacts in a seamless way.
If the EU remains set on its current course (and that seems very likely) and if social networks become of increasing importance (and to me that too seems likely) we may see a significant business advantage being handed to non-EU countries, particularly Asia and USA.