This plugin got my entire hosting account suspended. It was set to default settings. The only thing I did was change some colors and also had to use a function in functions.php to edit the width of it since entering dimensions in the chat settings page didn't work.
The guy on the phone said it was hitting my server some 800 times per second (or minute?) and it shut it down pronto. Anyway, he said it'd be better not to use it, but is there a way to limit it's resources or something? I'd really love to use this. I host with Web Hosting Hub (cpanel) and they advertise as being an extremely WP friendly host.