Something that doesn't hinge on the specifics: perhaps it would make sense to set up a "email@example.com" mailing list?
It would presumably be Mailman 2 to start off with, but would then migrate to Mailman 3 & HyperKitty along with the rest of the python.org lists (hopefully some time in 2015, although we don't have a concrete plan for that as yet).
Sure - if it's not too much effort to establish.
I'm not sure exactly what would be discussed there, especially in the short term when the big ticket item is getting the patches into the main Python tree.
I'd think the core devs would be far more likely to include a patch if it comes with a big red note on it saying "it was discussed on mobile-sig and was blessed by all participants" as opposed to a random patch by a random person.
However, mobile is a significant platform these days, and it can't hurt to have a place where the various players can co-ordinate and collaborate where possible.
Yours, Russ Magee %-)
-- Psss, psss, put it down! - http://www.cafepress.com/putitdown