"In the event that WhatsApp is acquired by or merged with a third party entity, we reserve the right to transfer or assign the information we have collected from our users as part of such merger, acquisition, sale, or other change of control." http://www.whatsapp.com/legal/
"The contents of messages that have been delivered by the WhatsApp Service are not copied, kept or archived by WhatsApp in the normal course of business."
followed by
"If the recipient is not online, the undelivered message is held in WhatsApp’s server until it can be delivered. If the message is undelivered for thirty (30) days, the undelivered message is deleted from our servers. Once a message has been delivered, it no longer resides on our servers. The contents of any delivered messages are not kept or retained by WhatsApp — the only records of the content of any delivered messages reside directly on the sender’s and recipient’s mobile devices (and which may be deleted at the user’s option)."
