[dwolchon]

I think that Facebook has been so successful because it appeals to stalkerish nature in everyone. They want to browse the site, see what people are doing, and what is going on in their lives. That's why I think it's more powerful than what LinkedIn is doing.

I think people are more interested in changes in their personal life (or friends lives) on a weekly basis than careers on LinkedIn. I agree that LinkedIn is focused on business and someone's career, but I think that there is far more potential in doing the same thing but on a personal level (which handling it carefully, as you suggest).

I think that a heat map of friends is a good idea, but it's a one time element that is useful for you and potentially your friends. I'm thinking that the newsfeed aggregator would be better at getting users to come back into the site on a more frequent basis. Maybe it isn't needed as much because so many of Facebook's users come back to the site on a daily basis.

Interesting feedback! Thanks for the comment.