I was reading on Slashdot a discussion about iTune 4.8 and its new capability to purchase videos from the iTunes Music Store, when I read two things that just made me say "duh" with their obviousness, yet I'd never thought of them before. Both of these "duh" moments were inspired by the comments by an anonymous Apple engineer with the handle As Seen on TV: Everybody's wrong about the video iPod thing.

In my post about the Dunbar Number I offered some evidence on the levels of satisfaction of various group sizes based on some empirical data from online games. There I was able to show that even though the Dunbar Number might predict a mean group size of 150 for humans, that in fact for non-survival oriented groups the mean was significantly less, probably between 60 to 90. I also offered a second hypothesis, that there is a dip in satisfaction level of groups at around the size of 15.