Hey - Garret from HipChat here. We're still working on retina assets for some of the app icons, and haven't started on retina versions of the emoticons quite yet. Hang tight!
My company is limited to our chat products due to HIPAA compliance and we would love to use this product for company chat but host it on our own infrastructure.
[1] http://help.hipchat.com/knowledgebase/articles/64377-xmpp-ja... [2] http://help.hipchat.com/knowledgebase/articles/64436-how-to-... (I love Adium!)