A comment on IRC:

so, is the whole thing a place for employees to vent their inevitable frustrations, but in a place where absolutely no one will ever see them and thus they can't cause any damage whatever?

How very perceptive :)

Roller seems to be a bit of a PITA. There's no trivial way to preview a post, for one. You have to save a draft, then "Edit" the draft, then post it properly. Seems rather a silly way of doing things.