Rust London User Group (meetup.com) used for organization of our meetup dates, as well as the regular evenings with talks.
Our namesakes:
The Rust Community Reference (community.rs/resources/), the ultimative Rust resources list
Next Iteration of “The Rust Programming Language” Book (HN) ("People should know this isn't ready") (also see: What’s new with “The Rust Programming Language”?: "Let’s talk about what’s going on with the book today." (HN))
Programming Rust ("Another excellent book (...), especially if you already know C/C++" (HN))
CIS 198: Rust Programming (University of Pennsylvania) (Github) (see schedule)