Eric Levine, PR manager for SCEA commented on this and said the ones who buy it early will only enjoy the single player features. The online elements will only go live on the official date which is later this week.
Production on LittleBigPlanet PlayStation Vita was completed earlier than expected, and due to the excitement from our retail partners, some have decided to put it on shelves as soon as the product was received.
You’ll still be able to fully enjoy all the offline features of the game, but the servers will not go live until September 18. We apologize for any confusion this may cause and will keep you posted on any further updates.
LittleBigPlanet Vita got many favorable reviews from major gaming websites and is a very strong buy for any Vita owner.