Business applications for social networks

Last few weeks we were actively studying existing business applications for social networks. If the result of our research will be interesting – we will publish a separate post on it.
It is already evident that there are not that many marketing applications designed for social networks. Software developers could not create applications which could be interesting enough for network participants. Few existing applications could not spread widely among users – virus marketing did not work for them. So, preliminary summary – despite the common agreement on importance of representing business needs in social networks, such representation is very basic at the moment – only specialized groups and few applications with embedded promotions.