I came across a project today that was blocked on getting YAML support for Serde, so I figured I would announce my YAML library here in case anyone else is blocked.
[dependencies] serde = "^0.7" serde_yaml = "^0.2"
The API is largely identical to serde_json. It can serialize and deserialize by using yaml-rust for emitting and parsing YAML.
I have updated the Serde readme to refer to this.