Rust 0.8 Released

This was another very active release cycle that continued the trend toward refining the standard library while making minor adjustments to the language. In this release the `for` keyword has been changed to work with `Iterator` types, the runtime and task scheduler was rewritten, a new experimental I/O subsystem was added, and we added a new family of string formatting macros, `format!`, that will eventually replace `fmt!`.

The brief release notes are included in this announcement, and there is further explanation in the detailed release [notes] on the wiki. Documentation and all the links in this email are available on the [website]. As usual, version 0.8 should be considered an alpha release, suitable for early adopters and language enthusiasts. Please file [bugs] and join the [fun].