Comment by Deestan

Be aware that Hipchat are now rolling out a new "feature" in which the account admin can read all private 1-to-1 chat: http://help.hipchat.com/forums/138883-suggestions-ideas/sugg...

This could be a significant issue for some, both morally and legally.

If you are using / are going to use Hipchat with this enabled, at least make sure you are aware of any legalities you need to conform to because of this. E.g. gather consent from employees.