Farmville players exchanged 220m virtual Valentine's Day gifts in the first 18 hours of release

"Valentine’s day is still a few days away, and Zynga and the rest of the Social Games developers will surely be announcing the massive exchange of virtual goods after it has passed. In the meantime, we have a few numbers and descriptions of the available products from Zynga. First of all, Cafe World has ha 100 Million gifts exchanged so far, with 7.5M unique users have exchanged gifts. Farmville, Zynga’s biggest game at nearly 80 million Monthly Active Users, had 220 million Valentine’s Day gifts exchanged in the first 18 hours since their release. No word on the monetization of these goods, yet."
Source: AllFacebook, 10th February 2010