aggregate comment view in roller?

New features for Roller
— Group blogging would be great, especially in
corporate/work environments where you might have a blog per
project.  A work around we have used, is enabling a view of posts
by all users to a certain category.  So, everyone would create a
category for that project if they wanted to post entries to that
category page (e.g. /roller/category/java).  (I guess sort of like and flickr, viewing categories more as tags instead of a
singular subject).  Adding aggregate category view pages like this
might be nice.