I have always recommended “The Interactive Way to GO” as what I think is the best intro to the game. However recently someone wanting to learn GO in between work on their Iphone was unable to use the site due to lack of support on mobile platforms for Flash and Java.
Are there any other sites as good? I think it is superlative in that teaches and practices a simple concept before moving on. ( And it is Japanese rules which is most common in the US)
I would love it if OGS hosted "The Interactive Way to GO " in their web based fashion. That way anyone could use it and it would be a great lead in for OGS.
I await comments from people more knowledgeable than I.