Olark as a networking tool
theborski.com
theborski.com
I've switched to SnapEngage after doing a live chat with Noah at AppSumo using their widget on that site and love it so far. Rather than try to assign a bot to every visitor currently on my sites, they seem to only assign a bot when a chat is initiated, which works great.
I'd be happy to offer you a deal to try us out again, and definitely appreciate your feedback for helping us improve.
Come say hello: http://www.johndbritton.com