Our API directory now includes 180 finance APIs. The newest is the TTAGG Stock API. The most popular, in terms of mashups, is the PayPal API. We list 33 PayPal mashups. Below you'll find some more stats from the directory, including the entire list of finance APIs.
After Facebook announced that apps can be deployed to Heroku, the cloud platform saw tremendous growth. It's on pace to add five times as many applications in 2011 as it had last year, likely fueled by being the only cloud service supported from within Facebook. The two companies introduced a new concept in developer relations, the "click-to-cloud" sample app.