Hey! In relation to my recent getChild problem (specifically, I want to return deferred resources from it), it has become evident that IResource just won't cut it for a number of reasons and we should probably replace the API with something else. The issues we should take care of in this new API: 1. http://tm.tl/3711 (returning deferreds from render methods) 2. http://tm.tl/3621 (returning deferreds from getChild and friends) 3. http://tm.tl/288 (accessing uploaded data while in progress) If there are any missing tickets I'm forgetting about that are only fixable by breaking the interface, now would be a good time to speak up. I have created a new ticket (http://tm.tl/5152) for the new interface using an integration branch that addresses the issues in the individual tickets on a new interface as Glyph proposed. I've also commented on #3711 to say that it just won't work that way and that we need a new interface, referring them to the new ticket number. What should the migration plan look like? At least from the code point of view, exarkun has already partially answered this question: http://twistedmatrix.com/trac/ticket/288#comment:31 cheers lvh