Simsi - 5:29 pm on Dec 10, 2012 (gmt 0)
As far as I know FB already have Search but they haven't promoted it and they use Bing search result...
I think they are planning to buy Bings "adsense" too and if they do I think I will switch my AdCEDNTS to FB/Bing instead
That doesn't take into account the mindset of people on Facebook. In my experience within my niche, the average customer spend from a Facebook referal is about 1/6th that of a Google referal.
Now right now, that seems logical to me: people are on social networks primarily to socialise, not to buy (although I should add the volume and cost of clicks my ads got seemed way better than on Adwords) so really, any commercial stuff is the online equivalent of cold-calling.
So IMO it will depend on how Facebook positions it's search engine and whether they can convince people to actually & purposefully go to FB to do search.