Read Write Web has a summary of Facebook engineering manager Dave Fetterman’s talk at the f8 conference. He tells an in-depth, technical story of the evolution of Facebook’s mobile strategy.

Being able to write it once today and ship it tomorrow? That is something that Facebook is really good at and that we love doing and that is at the center of being able to move fast. Move fast has an implicit third clause – move fast, break things, and fix things fast. That is very difficult to do if you have already shipped your binary to Apple or Android and they have to download another version of it.

It’s like responsive design for products instead of websites.