Twitter Expanding Horizons; well in Japan anyway.

Now, I'm not positive as to what this will trickle down to in terms of Twitter everywhere else, but today they released a site called Twicco which allows a Twitter user to follow (or create) a Twitter group, rather than just a single user/person. Although Twitter Japan is already different using ads, hopefully the group option comes to the universal site, and not the ugly advertising.
The benefits of following a group are seemingly cool, and have quite a lot of potential. Even though Yammer is for businesses, Twitter could replace this, using the group feature to implement tweets for each department of work. Also, gamers could follow a group of updates that they choose to: for example if I like EA's NHL09 and FIFA09. EA could create a group for Twitter that would allow you to effectively "choose" what part of the group you would want to follow. Also, one could group people into "people I know" and "creepers on Twitter who somehow got my name." I would use those groups...no really.