Thanks to Gilbane for pointing this out. SilkRoad has officially coined the term "Enterprise Blogging".
Its quite a broad term. This is how they describe it: "an essential enterprise tool for one-to-many and many-to-many communication". That clarifies things.
SilkRoad are on to something though. And they are not alone. Blogs are coming out of geekdom and into the enterprise. SilkBlogs
lets users create group blogs and track who has joined the blog and who is currently online. In addition to posting messages, SilkBlogs also provides tools for tracking project status.
Here are some additional resources on the topic: