You can access and post to your MediaGoblin instance via any of several Pump.io compatible clients, like Pumpa and Dianara (or write your own using PyPump)! The grand goal is a generic (and ubiquitous) client protocol that will work with lots of different served applications that use the pump standard. Eventually, any Pump API compatible client will essentially be a MediaGoblin client and a Pump.IO client. We expect more client types to be added very soon!

http://mediagoblin.org/news/mediagoblin-0.8.0-gallery-of-fine-creatures.html