ActivityPump API

I thought people on this list might find the new API document I wrote 
for the ActivityPump interesting:

https://github.com/evanp/activitypump/blob/master/API.md

It's a simple (/I/ think) API that follows the patterns of Atom 
Publishing Protocol but uses Activity Streams JSON as a feed and entry 
format. (It's based on work I did on StatusNet, which has a similar API 
based on the Activity Streams Atom serialization.)

tl;dr version: each user has two primary streams (represented as 
Activity Streams multi-page collections): an /outbox/ that contains 
activities they've done, and an /inbox/ that contains the activities of 
people they follow. To make something happen, you POST an activity to 
the outbox.//

One side-benefit is that the inbox makes a nice endpoint for delivery of 
activities from remote servers. This serves the same purpose as 
PubSubHubbub and Salmon in the OStatus stack -- but considerably easier, 
I think. It requires Dialback authentication, however, which is a) easy 
but b) only a few weeks old.

I'd love any feedback here or as a github issue. There are plenty of 
test cases in the ActivityPump repository.

-Evan