I read that on Monday Facebook will launch a new messaging system, which includes Facebook's email adresses. So, you will possibly recieve spam messages in your email adress from your "friends", but be careful, because a lot of fraudsters are increasingly using hacked Facebook accounts.
Users also need to be aware that Facebook will be storing a complete archive of all their communications with one person. This raises concerns as to how this data could be misused if it fell into the wrong hands!!!!