Besides information about the AGA, this website also has a calendar of go events, and a large list of links.
English homepage of the Russian Go Federation, Russian news in English
Apart from information about the BGA, this site also has a large section on various go-related resources, e.g. very comprehensive lists of go servers, and of go playing computer programs.
The website of the French Go Association. Among other things, you can play 9x9 games against GNU Go there.
The English version of the home page of the Nihon Kiin.
The German Go Association.
From the page: "The goal of the European Go Centre is the promotion of Go in Europe. The Go centre aims to inform the general public in Europe about the existence, background and rules of the ancient game of Go."
Russian Go news, history, interviews, magazine (eng/rus)
Information about go in South Africa, and general links related to go.
The Dutch Go Federation.