IGS and tweet are also the central theme in a long running flame war in rec.games.go. The contention generally involves those that prefer NNGS to IGS, and spirals out of control from there.
More about IGS: Originally IGS ran on two servers, on in the US and one in France. The server in France was not as busy as the US server, for various reasons (Mainly due to critical mass of a group, i.e. more people draws more people.) Once the code was bought by NKD (a Japanese company) the server was moved and those in Japan had to subscribe while those outside do not.