From Facebook Developer Wiki

I'm the webmaster (yes, I'm using the term!) for a series of language education websites. The most popular is Online Spanish Help. I recently began working with three other people for these sites, two developers and two designers for these sites.

Currently we're in the process of integrating Facebook Connect throughout the sites. Facebook Connect provided us with a great social networking infrastructure. Without having to develop this in-house, we can concentrate on developing more interesting social interactions.

Immersion is the best way of learning a new language. With Facebook Connect, we can enable the social interactions of which is immersion made.