Version 0.1.0 of RbYAML has now been released. Most of the interesting work on this was done on the flight from San Francisco and JavaOne to Stockholm. I guess I got tired of all the Java code. Anyhow, this is a major release, which improves almost all areas, with better testing, more functionality, Ruby-fied code, a new parser, and huge performance improvements.
I will take some time later this week to write more about the things I have done, implementation-wise.