Proposal: Game of Go
I'll be frank: I am afraid this site might fail.
In my opinion, it is absolutely necessary to be able to include content from Sensei's Library without loss of functionality. Most of what the SE model provides should be fitting, but I'm not certain about the site-specifics like diagrams.
We obviously have to look at http://www.shidogo.com, the SE 1.0 site that tried to solve this issue. The basic idea back then was to include Eidogo - which is certainly somewhat reasonable and was somewhat successful. However, I doubt that most casual users are fine with going over to Eidogo.com to create their diagrams - it's just too much of a hassle.
Instead, I think we need to be able to create diagrams within SE. The content (sgf file) should also be stored locally - for instance to enable comparison between revisions.
The question (to the SE mods) is: Would this be possible? If you require more information about the topic, I'll be glad to answer - of course I suggest to contact the author of shidogo (mindeavor) as well.
Apart from that, there are multiple other sites that revolve around Go as well - most of them in a wiki or forum style. I believe their users could find accept the SE model, too - except for heavy discussions, which are likely in this game. What should we do about them? I feel we need to improve the comment functionality further, there are certainly a lot of ideas on MSO already. These should be given increased priority.