I've created a pair of Inner Space extensions that can be used along with Ventrilo or TeamSpeak. The extensions read basic information from the Ventrilo or TeamSpeak windows and make it available to Inner Space scripts.
For example, I created basic scripts to go along with the plugins that -- by default -- show the last 5 people to speak in the upper left hand corner of the screen. Of those 5, anyone currently speaking has their name shown in green, while the others are shown in white. All of this is fairly easy to configure in the script -- how many people to list, what colors to use, where to put them on the screen...
This review on ISMods has a screenshot and a little bit of information:
http://www.ismods.com/forums/viewtopic.php?p=679