Earlier this month Facebook launched the sale of gift cards through Target stores in the USA.
For me, this launch provides another great piece of evidence of the online-offline blur = a totally online brand (Facebook) merging into a physical store location (Target USA). According to Mashable, Facebook are looking to launch the card through three other national US retailers this year.
The Facebook "credits" card will operate as virtual cash redeemable on games (think Farmville), web applications and virtual goods.
According to one report on Inside Facebook, "the virtual goods market is expected to reach $1.6 billion in the US alone this year... with $835 million coming from social games alone"