Trying to decide if I should buy facebook WHEN it gets to $4 in the near future. Facebook is so huge but most of their income comes from advertising and if any of you have ever tried advertising on facebook, you know that every $1 you spend on advertising on say Google, you have to spend $4 on facebook to get the same results. With that kind of return, I think that they wont be in the advertising business long. Which makes me wonder....will facebook be a good buy at $4? They have integrated themselves pretty well into the internet so its hard to imagine people will start to go elsewhere, but if they dont find another stream of revenue soon, I think this company will not even be worth $4. What do you think?