We just released our second version of Talkative (meettalkative.com), three weeks after the release of v1. We had ~15-20 customers using v1, and they provided great feedback about how to improve the customer and user experience. So we added
Auto-calling. Contact everyone who hits your website automatically
Popup options - customize how you want to notify your visitors
More advanced event filtering
Geolocation - understand where your site visitors are coming from