We have INOVA. I used to do alot with it but not much as of late. It integrates with CMS via a telnet screen scrape approach. My understanding is that you can also acquire data via RT Socket.
We have had INOVA for a long time through varying versions. It is much more user friendly now. Not just a wallboard, more of a shared communication approach. Authorized users can display messages on different output groups. Set canned messages to display when thresholds exceeded, etc. You can get a complementary (certainly not complimentary $$$$) applications, Message Manager and Data Manager, that lets you predefine popups to display on user desktops again when certain conditions are met or continuously.