20 months after the initial announcement of Dart, the language and its associated VM have entered beta with milestone M5. There are many small improvements in the current release, the most important ones being related to the Editor, VM, and dart2js.
Is a universal web bytecode worth the trouble creating it? Is LLVM the solution? Which is better at running native code in the browser: Mozilla asm.js or Google PNaCl? This article contains opinions expressed on the web on these issues.