A recent tweet from Nawzil who is considered to have some MS-insider connections claim Instagram arriving to WP store in just one week.
— Nawzil (@Nawzil8) November 17, 2013
Our Mill-O-Meter score for this rumor is 60/100 as this is the first time we will use their tip.
One more tweet from the same account shows an upcoming feature from Whatsapp Private Beta. Perhaps, next Whatsapp update will bring feature to delete unwanted old chats from history.