Just a dump of integrations you (and I would like to see).
Statistics logger + database.
This one excites me a lot. This is a module that doesn't return a response, but aggregates data about your API: who is using it, your most popular content, summaries of various endpoints. Implementation wise, it might change a lot of the way integrations are done currently (e.g. you can't access data cross-integration right now).
Pinterest (unfortunately I think their API is quite disappointing)
Youtube, Flickr, file hosting. More media the people like to promote.
LinkedIn, to provide a standard interface for your professional profile.
Just a dump of integrations you (and I would like to see).