That ephemeral thing, the Social Networking phenomena, is still in full swing.  Zynga, the online games developer behind hits including CityVille and FarmVille, is planning an initial public offering (IPO) that could value it at $20bn. 

(And they’re not the only ones, LinkedIn, the business-focused social network, has already gone public and is valued at $8.6bn. Next year Facebook is expected to go public – analysts have estimated it could be worth $80bn or more.  But given the nature of the market, I would think twice before investing in any of these issues – unless you have some spare money, in which case I would go for it.  Personally, I’m saving my pennies for when Rovio, the makers of Angry Birds, goes public.)