Betfair PHP Sample Code by Betfair demonstrates a basic use case of placing a bet on the next GB Horse Racing market. A comprehensive description of the samples can be found in the developer samples documentation. This sample code is written in PHP, and is related to the Betfair APIs.
The Facebook API saw huge changes in 2010 that moved the service away from being a closed network and towards being a more open community. The leading social network site must be doing something right on that front. Facebook was the third most popular service for use in new mashups last year, nearly doubling its total number in our directory.
There have been a lot of new socially based mashups showing up recently. In fact, we recently topped 700 social mashups. While many of these use the Facebook API or Twitter API, there are many more social APIs. The mashups below run the gamut, though, yes, also include Facebook.