There's a language reference and a tutorial:

http://doc.rust-lang.org/doc/rust.html

http://doc.rust-lang.org/doc/tutorial.html

The technical reference manual: http://doc.rust-lang.org/doc/rust.html

The friendlier language tutorial: http://doc.rust-lang.org/doc/tutorial.html

Reference here: http://doc.rust-lang.org/doc/rust.html

Tutorial (probably better at the moment): http://doc.rust-lang.org/doc/tutorial.html