We used to have Yammer. Now we have Chatter (salesforce.com). They’re forum-like software with notification features.
I’ve found both invaluable for cutting email traffic and serendipitous contact with folks with common interests in e.g. text analytics, data analysis, social media analysis, research, and reference materials. It’s also been very good for exchanges with folks in other, diverse, parts of a 40,000+ person organisation that spans the globe.
Folks use it for all sorts of things, some very corporate, others less so. The diversity of people and posts is just part of the experience. Usage isn’t as widespread as I think some folks would like but not everyone likes internet forums and social media.
the standard language for exchanges is English. I’d like to see it shift to local languages but with the option to auto translate to your locale settings. Maybe that’s a few months off.
The groups stuff can be handy but can also lead to balkanisation of topics. The topic/tag adding features are handy though.