recently (last week?) came some rumors about new slim aluminium macbooks, since then no more news has surfaced. is there usually an average time span between rumors of this kind? i would guess that rumors become more frequent as the launch date of an apple products gets closer. but i thought that some-one who has followed apple rumors for a while may know the average time gaps or cycle that is typical between rumours, or if its all down to random. any comments would be interesting.