Can it also be used with socket.io? I'm working on a real-time app and I'm using socket.io to transport the data and graphing it on canvas. I'd be happy to use a graphing library that 1) looks good, and 2) works with real-time data, instead of my custom solution.

I looked into it briefly, right now i'm more focused on getting the charts right. Once I've done that I was going to work on different data transport options.