The CoinDesk Go SDK by Martín Raúl Villalba allows API interaction to access bitcoin data. Installation included. Demonstration available at https://github.com/mvillalba/go-coindesk/blob/master/bpidemo/main.go
Rather than getting caught up in a religious debate about the best method for integrating applications, it's best to accept the fact that depending on the age and the use case of the application, every integration scenario is likely to be different. Recognizing that reality, Informatica this week unfurled its Informatica Cloud Winter 2014 cloud service that, in addition to providing more business process controls, now includes support for RESTful APIs.
One of the primary reasons that organizations embrace agile development methodologies is on the assumption that faster application development will result in more applications being developed faster. The challenge is actually managing that process in a world where the number of languages and data sources being used is rapidly expanding.