Olark is a great product, only gripe (which isn't a big one) is that I liked having a photo next to my name in the chat box. I felt a photo went a long way when people could actually see who they were chatting with. I haven't used olark in over 6 months though so you may have added that feature in, I'm not sure.
Yes - haha we actually do have that now, but admittedly not as well-integrated into themes as groove has. It's something we'd like to work on more, but there are a couple other items on the roadmap that are much higher priority.