I love this question! Gets my creative mind flowing early morning.
Here a few from top of my head:
-Heart2Heart
-Tete (tete a tete reflects a deep personal conversation between 2 people)
-InterCo (for interaction & communcation)
-InAccord (self explanatory)
-tootalk
-chatspot
-lucidity (play on clarifty)

Even if you don't like them, I kind of like some of these. Please feel free to google me, if you feel i can be of any help let me know. I'm one of Arizona's best commercial strategists.