> I'm thinking of submitting a talk at PyCon to explain what we've discover so far in IPython.

You totally should!

Or actually there are two options to think about: you can submit a general talk, or submit a talk to the language summit. (Or write two talks and do both, I guess.) They're pretty different – the summit is a more informal thing (no video, smaller room), mostly just core devs, more of a working meeting kind of thing where you can argue about technical details.