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.
While working with Big Data affords a lot of potential business value the complexity of building applications that manipulate all that information can be nothing short of daunting. Not only do most of the currently popular approaches require developers to master arcane interfaces such as MapReduce, the performance of the application tends to suffer under the weight of all the data that needs to be processed.