Learning Go

• Interactive Way to Go Learn the rules and basic strategy
• Sensei's Library A wiki with lots of great information
• Kiseido Publisher of Go books
• goproblems.com Hone your skills by working go problems.

Playing Go

• Internet Go Server (IGS)
• Kiseido Go Server (KGS)
• GNU Go

Go organizations

• American Go Association
• International Go Federation

Go Equipment

• Shodan imports Japanese-made Go Equipment
• Yellow Mountain Imports Chinese-made Go Equipment