Our API directory now includes 53 feeds APIs. The newest is the App.net API. The most popular, in terms of mashups, is the Google Ajax Feeds API. We list 45 Google Ajax Feeds mashups. Below you'll find some more stats from the directory, including the entire list of feeds APIs.
Within most enterprise IT organizations there is a tension between classic approaches to middleware based on software-oriented architectures (SOA) and approaches based on APIs that are easier to build and deploy but potentially more difficult to manage.
American Express found another way to convert social media to cardholder transactions at the SXSW conference using the still-private Smart Offer API. Amex's “Sync. Tweet. Save.” social marketing promotion positions the credit card for the social media generation beyond membership points.