If I'm not online, you can also use the feature to quickly send me an email. Neat, right? I'll do my best to respond as soon as possible (usually same day!).
Just look for the blue tab in the lower right side of the page -- if you click, it will open a small chat window or email box if I'm not online (no need to open your email client!).
My chat is powered by Olark.com. A more formal review on that service after I test it out a little longer.
Let me know what you think and hope to chat with you soon!