honestly, i was worried too. but after setting up my timeline, it looks quite nice. one of the unused assets of facebook and twitter are our past activities on them, it is more profound in case of twitter, where consuming our past tweets is really a bad experience, honestly i dont know it would add much to the twitter experience. the other end of this spectrum is the photos experience in facebook. no matter at what time you added a photo in facebook, there is this photos app to make it easier to consume it all at a time, and checking out the albums of a friend/stalkee/victim is one of the things i would do most of the time when i am in their profile. now with timelines, you will be knowing more about the person, and i think i will be spending quite some time checking out friends timelines similar to albums. even though some what skeptical at first, after using it, i quite like it. it is not clumsy at all.