I am sure most of you are already aware of the facebook timeline feature. It basically is a significant change in the design of a your homepage and also gives your friends the option of going through your old posts and activity which is logged from the time you have started using facebook.
Though promised in September, the timeline feature has not been enforced for all users but only for the developers who chose to do it. It has just rolled out in New Zealand for all users. More info here. If you have not switched over yet here is the link with instructions. Wait! Before you go on, here are some interesting security implications which might interest you.