http://www.olark.com/portal/tour.html http://www.olark.com/portal/tour.html gives you a pretty good idea of what you can do with Olark. I think the biggest dif

http://www.olark.com/portal/tour.html http://www.olark.com/portal/tour.html gives you a pretty good idea of what you can do with Olark. I think the biggest difference between Olark and the similar competition is that you get to see the visitors to your website in your buddy list of your IM program. (And yea, you can proactively chat with these visitors using Olark)