NNTP is the native format used by the internet for News groups (aka Forums). See:
for some details and information. The idea is that this would also be available from Connections, in a native in-product (no addon server), so that news group followers could use it to follow
News readers are very lightweight, and allow the end user to follow a lot of forums at one time, see threading to some degree, etc. And there are a lot of News readers available, the wiki reference gives a list of some. The idea is that IBM would support open standards and interfaces to its Connection product.
Some advantages of NNTP over Atom and RSS:
NNTP support would allow users to become more efficient and effective.