Sam and Ryan talk about

Functional CSS training at EmberConf
Some ideas for hiding styling implementation details from templates
A new setup for multiple staging environments
An idea from data modeling called “Making the impossible, impossible”
How to use data down actions up effectively in forms

They also answer some listener questions:

When should I use polymorphic or reflexive relationships?
When do I need to explicitly name a relationship’s inverse?
When should I reference relationships and when should I embed them?