Go Language Documentation
The documentation available in the main Go site is excellent, here are a few extra things you might also find useful.
- Collection of various unofficial bits about Go Internals, gathered by d.majumdar.
- Go’s Package Name Space - Blog post by Russ Cox.
- Defer, panic and recover:
- Go Channels - Blog post by Ian Lance Taylor.
Documentation in other languages
- golanguage.ru - Русское сообщество языка программирования golang.