This is illustrative of a rather fundamental and all-too-common misunderstanding: REST-RPC.
Of course, the project description includes the obligatory quote about Amazon:
Amazon offer both a SOAP and a REST-compliant API. Tim O'Reilly expects as much as 85% of the usage to go via the REST interface; see his blog entry "REST vs. SOAP at Amazon".
I've already made my thoughts known on the alleged RESTfulness of the Amazon API.
REST != POX
Thanks to Stefan Tilkov for the link.
