IBM has added a bunch of enterprise 2.0 features to its Lotus Connections suite including status updates. I think this could be a big deal. Status updates could provide the communications glue that keeps everybody aligned and on strategy even as decision making and power are delegated to the edge of the organisation.
You could use Twitter for this, but it would be a hassle and it may be that few people buy IBM just for the status updates, but I wouldn’t be at all surprised to see microblogging become widely used across enterprises over the next few years.
Standards for use and new etiquette will need developing (e.g. to govern frequency of updates and appropriate mix of personal and work updates) and as with all new media there will be those who resist adoption, but the productivity and cultural benefits will make it all worthwhile.