Skillscast coming soon.
Rust! It's the latest flavour of the month. Find out about this friendly low-level language, why rockstar Rubyists like Yehuda Katz and Steve Klabnik like it, and how to embed it in your Ruby code to get a bigger speed boost than those shiny stars in Mariokart.
A Brief (and incomplete) introduction to Rust (for Rubyists)