I come from an Ember.js background and its router / nested layout management is the best I have used. I like react, and have been diving into OM as well in my free time, but I'm not sure of the best way to approach routing / page transitions.

When I start an app, I do not think from the bottom up, which is the react way. I want to start with the login page and redirects, or get the major page transitions down. I'll be interested in seeing how you approach that.