Important changes to the model (moving from ACE to relational) – announcement here, FAQ here. Stay on top of details via the MSDN dev center – here.
Take note (from the FAQ)
“Your latest blog posting says that the ACE model will no longer be supported – I guess you are referring to the SDS storage, does this also include the Windows Azure Storage?
These announcements do not affect Windows Azure Storage in any way. That is still a key foundational piece of the Azure Services Platform.”