There is a growing expectation that Facebook will emerge as a key platform for commerce-based business models.
To the extent that sales originate through traffic, then Facebook already has achieved critical mass. Referral traffic began to clim when the 'Like' button was launched, some would argue.
Referral traffic to retailers and brands from Facebook began to climb. In August 2010, a few commerce brands even had more referral traffic from Facebook than Google.
Facebook as a meaningful source of referral traffic for e-commerce is a trend, and a case for commerce is emerging.