I must say data portability lowers the barrier for people who want to build their next app with Parse or other such providers but are worried about a virtual lock-in with a provider.
I guess the next step is to develop standards in the cloud which allows portability of the application itself from one provider to the other.
If anyone from Parse is reading this - was this a user requested feature or was it on the road map for Parse originally? Doesn't it work against your business if you let people move out of your infrastructure easily?