When we wrote about APIs fueling an "instant" frenzy, there were only four mashups in our directory tagged instant. We've added more than that just this week, taking our total to 16 instant mashups. But the most common type of instant mashup may surprise you.
Service discovery is not an easy task in today's Web. Discovering an API requires searching through a large number of services on the Internet and then reading pages of documentation to figure out how to use the ones that may match your application. This is the case in Programmable Web as well. The API directory shows over 5000 APIs which are manually categorized in over 50 service categories.