The login ads-screen probably caters the needs of less than 1% of the users using RightNow on a day to day basis.
Agents on the phone/email are not interested in the daily RN ads, they prefer to view information relevant to their work.
Currently we are talking about a waste of space. RN ads should however be visible to admins (via e.g. notifications).
Why would an agent be interested in "Is your call center suffering from feverish operation costs" or "RN May Release 09 - Delivring Busienss Insight on demand". You get my drift. 
We would like to be able to add relevant broadcasts, by at least using HTML and possibly also Flash, Javascript...
This was (somehow) possible in Pre 8.8 versions though any form of customization has unfortunately been removed.
Thanks.
Kind regards,
Karim Michael Hambach
TomTom Sales BV