An interesting thought occurred to me, I think the "weighted keys" might help

[xeroc]

it's called "threshold signatures" .. and maybe it would be possible to have a set of keys that have 51% threshold (any two parties can sign) .. and a set of 10% keys (you need 10 people to cooperate) ..
This *really* is a big thing!! Just as big recurring payments

[VoR0220]

Right now I'm thinking of how to solve a problem in a torrenting application. One of the things that I'm having trouble with is creating a multi sig address that, in the case of many parties (say over 10 for good understanding) can dynamically update if it turns out one of the parties is unreliable, drop that signature, and bring in a new signature to sign on in the span of less then a second.

I get the feeling that this may very well be possible with the application of weighted keys. Any of the devs have any thoughts?